作者:P. Veeraraghavan Ramachandran、Agnieszka Tafelska-Kaczmarek、Kaumba Sakavuyi
DOI:10.1021/ol201551y
日期:2011.8.5
provides a series of chiral γ,γ-difluoroallylboronates. Asymmetric fluoroallylboration of aldehydes with a 2-phenylbornane-2,3-diol-derived reagent provides gem-difluorinated homoallyl alcohols in good yields and 77–95% ee. Preparation of a chiral α-pyrone in >99% ee has also been described.
与先前的报道相反,苄氧基二氟乙烯基锂与大体积的手性碘甲基硼酸酯的同系物容易提供一系列手性的γ,γ-二氟烯丙基硼酸酯。醛与2-苯基硼烷-2,3-二醇衍生的试剂进行不对称的氟代烯丙基氟合成,可得到良好的收率和77-95%ee的宝石二氟代均烯丙基醇。还描述了在> 99%ee中制备手性α-吡喃酮的方法。