作者:Valentine G. Nenajdenko、Georgy N. Varseev、Vasily N. Korotchenko、Alexey V. Shastin、Elisabeth S. Balenkova
DOI:10.1016/j.jfluchem.2004.04.002
日期:2004.9
An olefination of hydrazones of aromatic aldehydes by CBrF2–CBrF2 under copper catalysis was investigated. In situ prepared aldehydes hydrazones were converted to (3-bromo-2,2,3,3-tetrafluoropropyl)arenes by reaction with CBrF2–CBrF2 in the presence of CuCl. Subsequent elimination of HF by sodium hydroxide resulted in stereospecific formation of fluorocontaining alkenes. Elimination proceeds stereoselectively
研究了铜催化下CBrF 2 -CBrF 2对芳族醛的烯烃化反应。在CuCl存在下,通过与CBrF 2 -CBrF 2反应,将原位制备的醛转化为(3-溴-2,2,3,3-四氟丙基)芳烃。随后用氢氧化钠消除HF导致立体定向形成含氟烯烃。消除是立体选择性进行的,仅形成烯烃的Z-异构体。用叔丁基钾处理从(3-溴-2,2,3,3-四氟丙基)芳烃中消除两个HF分子-丁氧化物导致形成(溴二氟甲基)炔烃。结果,阐述了将芳族醛简单有效地转化为各种氟化烷烃,烯烃和炔烃的方法。