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Chemical Structure| 622-96-8 Chemical Structure| 622-96-8

Structure of 622-96-8

Chemical Structure| 622-96-8

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Luca Léo Schmermund ;

Abstract: The limited resources on Earth as well as the energy demand of the ever-increasing population urges us to develop new sustainable processes that cover the use of renewable energy and raw materials. In this context, coupling light with biological systems or enzymes for chemical synthesis is one possible way to achieve sustainable processes as light is a powerful and almost ideal source of energy. In recent years, the field of photobiocatalysis has emerged which brought together two sustainable as well as two research-intensive fields: Photocatalysis and biocatalysis. In this thesis, photo(bio)catalytic transformations were investigated employing light-dependent protochlorophyllide oxidoreductases and an unspecific peroxygenase. In the first part of this study, the library of light-dependent protochlorophyllide oxidoreductases (LPORs) was expanded and the potential of LPORs as biocatalysts was explored. LPORs require light for their natural reaction and catalyze the NADPH-dependent reduction of a C=C in an N-heterocycle of protochlorophyllide, a precursor of chlorophyll. Five LPORs were identified by a sequence search and four of them were well expressible in Escherichia coli and displayed activity. Overall, the study showed that LPORs are easily accessible and possess properties that are required for an efficient biocatalyst. In the second part of this thesis, a light-driven in situ generation of hydrogen peroxide by different carbon nitrides (CNs) was linked to stereoselective hydroxylations catalyzed by an unspecific peroxygenase variant from Agrocybe aegerita (AaeUPO). The chromoselective behavior of the CN allowed to create photo-chemo-enzymatic cascades to form either the (S)- or the (R)-enantiomer of 1-phenylethanol starting from ethylbenzene. The combination of chromoselective photocatalysis with biocatalytic transformation was shown for the first time. The novel concept represents a new tool for controlling reactivity and stereoselectivity in organic synthesis leading to excellent stereoselectivities.

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Product Details of [ 622-96-8 ]

CAS No. :622-96-8
Formula : C9H12
M.W : 120.19
SMILES Code : CC1=CC=C(CC)C=C1
MDL No. :MFCD00009263
InChI Key :JRLPEMVDPFPYPJ-UHFFFAOYSA-N
Pubchem ID :12160

Safety of [ 622-96-8 ]

GHS Pictogram:
Signal Word:Danger
Hazard Statements:H226-H303-H304
Precautionary Statements:P210-P240-P233-P241-P242-P270-P243-P280-P301+P312-P303+P361+P353-P301+P310-P370+P378-P331-P403+P235-P501
Class:3
UN#:3295
Packing Group:

Application In Synthesis of [ 622-96-8 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 622-96-8 ]

[ 622-96-8 ] Synthesis Path-Downstream   1~35

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YieldReaction ConditionsOperation in experiment
With phosphorus-silicon modified catalyst; at 360℃; under 3750.38 Torr; for 4h; The catalyst sample was charged into a fixed bed reactor,The loading was 6.5g. The reaction was carried out using toluene (> 99%) and polymerization grade ethyl as raw materials,Ethylene flow rate of 13.4 g / h,The toluene flow rate was 176. Og / h.The molar ratio of toluene to ethylene was 4.0,The total material airspeed is 29.2 hours 4,The reaction temperature is 360 C,The pressure is 0.5MPa.The results of the reaction conversion and the selectivity of the various products are shown in Table 1,Among them, the selectivity of the three ethyltoluene products has a wide distribution range,Can meet the different requirements of different business users and selectivity.
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YieldReaction ConditionsOperation in experiment
With hydrogen; In toluene; at 150℃; under 3620.13 Torr;Gas phase;Conversion of starting material; The column containing the dried adsorbent was placed in a heated enclosure at 150 C. and maintained at a pressure of 70 psig using back pressure regulators. Liquid phase toluene desorbent was directed into the columns at measured rates. A liquid phase 2 mL pulse of a feed containing equal parts normal nonane, ethylbenzene, para-xylene, meta-xylene, ortho-xylene, para-methylethylbenzene, meta-methylethylbenzene, ortho-methylethylbenzene, 1,2,3-trimethylbenzene, 1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene was introduced and the desorbent flow was resumed. While in the column, the C8 alkylaromatic hydrocarbons and C9 alkylaromatic hydrocarbons were maintained in the liquid phase. The effluent of the system was analyzed by gas chromatography to obtain the composition of the effluent. FIG. 3shows the concentration profiles of the effluent beginning with the background level of toluene desorbent. The concentrations of each individual species in a class were summed and the sum of the concentrations plotted. A region of effluent enriched in C8 alkylaromatic hydrocarbons elutes prior to a region enriched in C9 alkylaromatic hydrocarbons demonstrating that separation of the C8 alkylaromatic hydrocarbons from the C9 alkylaromatic hydrocarbons is occurring.
YieldReaction ConditionsOperation in experiment
5.3% EXAMPLE 26B Toluene and ethylene were reacted over the Ba-Modified ZSM-11 at 400 C. The feed WHSV for toluene was 7.0 and for ethylene was 0.5. Conversion of toluene was 5.3% and the yield of para-ethyltoluene in the ethyltoluene produced was 89.0%.
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YieldReaction ConditionsOperation in experiment
With ZSM-11; at 380 - 420℃; The embodiment at the same time providing one-step synthesizing methyl ethylbenzene and diethylbenzene method, with the embodiment 1 only in the different: the composition of the raw materials and a slightly different reaction parameters, the raw material is benzene, toluene, and ethylene, benzene and toluene ratio of 1 : 1.5, the method comprises pre-processing phase, and the post-processing stage of the reaction stage, specific steps are as follows: (1) pre-treatment phase: A) benzene, toluene after benzene, toluene heat exchanger heating to 120 C, enters the benzene, toluene gasifier, gasification and enters into the heating furnace is heated to 350 C; B) ethylene enters the ethylene gasifier and heating to 18 C; Ethylene and benzene and toluene feed ratio is 17, and toluene benzene including the follow-up of the amount of benzene, toluene and benzene in the system, the mixture of toluene and ethylbenzene enters the benzene, toluene that part of the gasifier; (2) reaction stage: The pretreatment latter benzene, toluene and ethylene-access hydrocarbon for carrying out the alkylation reaction in the reactor, in the alkylation reactor containing a plurality of catalyst bed layer, high ratio of the diameter of the catalyst bed is 0.75, the catalyst bed of catalyst is employed in the ZSM series of ZSM-11 molecular sieve catalyst, the alkylation reactor WHSV=11 vhsv the gross weight of; the inlet pressure to the alkylation reactor 0.9MPaG; is inserted to each of the laminated-tight layer of the catalyst bed the temperature measured by the temperature measurement element to the reaction starting temperature, the temperature is controlled at 400 C, bottom supporting ceramic ball in the temperature measured by the temperature measuring element of the bed as the temperature of the end of the reaction, the temperature is controlled at 420 C; the reaction temperature is controlled at 380 C; between each section of the catalyst bed is provided with a and benzene, toluene gasifier and ethylene pipeline connected with the gasifier, in this way the heat in the reaction process can be through relatively cold benzene, toluene and ethylene to digestion, and control the ethylene flow regulating bed temperature rise is kept at 20 C the left and the right, control acute leng Ben, toluene (or benzene, toluene, ethylbenzene) of adjusting the flow rate of the relative stability of the reaction temperature is maintained, to ensure the reaction temperature is maintained at a suitable temperature; after reaction for a period of time, to the reaction solution for chromatographic analysis, wherein the ethylbenzene (O, between, the two ethylbenzene, mainly to the location between the) total content exceeds 8% and interpositus diethylbenzene to para diethylbenzene content ratio of 6:1; methyl ethylbenzene (O, between, methylbenzensulfonate ethylbenzene, mainly to the location between the) total content exceeds 4%, and interpositus methyl ethylbenzene with para-methyl ethylbenzene content ratio of 3:1; can stop the reaction after processing; (3) post-treatment: 1) the alkylation reactor discharging through the heat exchanger, cooling to the 330 C, enters the benzene, toluene recovery system, the top of the tower pressure is 0.8, the overhead temperature is 190 C, the sump temperature is 280 C, after the rectification and purification, said benzene, toluene recovery system applicable for the top of the tower, the mixture of toluene and ethylbenzene, is hot tower cauldron material methyl ethylbenzene, coarse ethylbenzene and diethylbenzene; said benzene, toluene recovery system of the tower in benzene, toluene and ethylbenzene a portion of the reflux enters the benzene, toluene recovery system, in addition a part of the access-benzene, toluene gasifier, reflux ratio is 1.2; 2) the said benzene, toluene recovery system tower cauldron material access to an ethylbenzene rectification system, ethylbenzene column of the rectification system is negative pressure, the top of the tower pressure is 0.117MPaG, the bottom of the tower pressure 0.14MPaG, the overhead temperature is 160 C, the sump temperature is 218 C; reflux ratio is 2.5; after the rectification and purification, to the top of the tower the ethylbenzene rectification system ethylbenzene, the total content of the material before rectifying the total content of 5%, the main component of tower cauldron material is a ethylbenzene and diethylbenzene; 3) in the of the ethylbenzene rectification system into tower cauldron material in methyl ethylbenzene rectification system, methyl ethylbenzene column of the rectification system is negative pressure, the top of the tower pressure is 0.006MPaG, the bottom of the tower pressure is 0.019MPaG, the overhead temperature is 80 C, the sump temperature is 135 C; reflux ratio is 3.8; after the rectification and purification, ethylbenzene rectification system of the invention involves the top of the tower in methyl ethylbenzene of a certain purity, t...
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YieldReaction ConditionsOperation in experiment
With (5-phenyl-3-(trifluoromethyl)-1H-pyrazole)2PdCl2; ethylaluminum dichloride; at 30℃; under 7500.75 Torr; for 1h;Autoclave;Catalytic behavior; General procedure: Oligomerization and Friedel-Crafts alkylation reactions were carried out in a 40mL high-pressure reactor, which was dried at 100 C and cooled under nitrogen to the desired temperature before use. An appropriate amount of pre-catalyst was added tothe reactor under nitrogen together in degassed toluene (10 mL)and an appropriate amount of ethyl aluminium dichloride added with a syringe. Immediately after the addition of theEtAlCl2, the reactor was charged with ethylene and the reactor temperature was maintained at the desired temperature. Ethylene pressure was set at the desired pressure maintained at thispressure during the reaction After the set reaction time, excess ethylene was vented and the reaction quenched by adding 2MHCl in methanol. The oily yellow product formed was filtered to remove any solid matter, washed with 2MHCl in methanol and volatiles removed in vacuo. All experiments were run in triplicate.
 

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