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CAS No. : | 454482-11-2 | MDL No. : | MFCD11506069 |
Formula : | C12H22BNO2 | Boiling Point : | 252.5°C at 760 mmHg |
Linear Structure Formula : | - | InChI Key : | N/A |
M.W : | 223.12 g/mol | Pubchem ID : | 20773371 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | Stage #1: With TurboGrignard In tetrahydrofuran at -15 - -10℃; Inert atmosphere Stage #2: at 20℃; |
2nd step: under the protection of nitrogen, the 1.3M isopropyl magnesium chloride-lithium chloride (72 ml, 94mmol) into the reaction bottle, temperature control -15 ° C to -10 °C, dropwise N-methyl -1, 2, 5, 6-tetrahydro-pyridine-4-polybromide tetrahydrofuran (80 ml) solution, stirring finishing joining 1-2 hours. After the end of the exchange, then drop by adding methoxy boronic acid pinacone ester (15.8g, 0 . 1mol), subsequently maintain the reaction at room temperature overnight. Adding 10percent hydrochloric acid aqueous solution quenching reaction, adjusting PH= 4-5, by adding 150 ml ethyl acetate, saturated salt water an organic layer, the organic layer after evaporation to dryness, add ethanol/heptane 40:1 obtained after pulping 14.1g kind of white solid N-methyl -1, 2, 5, 6-tetrahydro-pyridine-4-boronic acid frequency that alcohol ester, GC: 98.3percent, yield: 63percent. |
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