provides a series of chiral γ,γ-difluoroallylboronates. Asymmetric fluoroallylboration of aldehydes with a 2-phenylbornane-2,3-diol-derived reagent provides gem-difluorinated homoallylalcohols in good yields and 77–95% ee. Preparation of a chiral α-pyrone in >99% ee has also been described.
Fluorovinylzinc Reagents: Access to Fluorovinyl Ketones, Esters, and Heterocycles
作者:J. P. Gillet、R. Sauvêtre、J. F. Normant
DOI:10.1055/s-1986-31695
日期:——
Several fluorovinylzinc reagents have been prepared. Palladium-catalyzed cross coupling reactions give stereoselectively flourinated compounds.
已制备几种氟乙烯基锌试剂。钯催化的交叉耦合反应能选择性地生成氟化化合物。
Reduction of 1,1-difluoro-1-alken-3-ols with lithium tetrahydroaluminate. Application to the synthesis of 1,1-difluoro-2-alkenes and 2-alkenals
作者:Frédérique Tellier、Raymond Sauvêtre
DOI:10.1016/0022-1139(95)03364-5
日期:1996.2
The reduction of 1,1-difluoro-1-alken-3-ols with lithiumtetrahydroaluminate is described. The 1-fluoro-1-alken-3-ols obtained can be transformed to enals or difluoromethylated allylic derivatives.
Synthesis of the ketodifluoromethylene dipeptide isostere
作者:David B. Damon、Dennis J. Hoover
DOI:10.1021/ja00173a066
日期:1990.8
La synthese de l'ester ethyle de l'acide 5-benzyloxycarbonylamino-6-cyclohexyl-3,3-difluoro-2-isopropyl-4-oxo-hexanoique est presentee
La 合成 de l'esterethyle de l'acide 5-benzyloxycarbonylamino-6-cyclohexyl-3,3-difluoro-2-isopropyl-4-oxo-hexanoique est presentee
Synthesis of fluorinated vinyl sulfides and selenides
作者:S. Piettre、Ch. De Cock、R. Merenyi、H.G. Viehe
DOI:10.1016/s0040-4020(01)90306-0
日期:1987.1
The reaction between fluoroolefins 1 and 10e and benzenesulfenyl or selenenyl halides 6 is found to be solvent-dependent and gives in most cases predominantly the regioisomer 8.The structure of adducts 8 and 9 are ascertained by 1H, 19F and 77Se NMR spectroscopy. Compounds 8 are easily halogenated and treatment of the products with magnesium or zinc leads to the desired polyfluorovinyl Sulfides and
发现氟代烯烃1和10e与苯硫基或硒烯基卤化物6之间的反应是溶剂依赖性的,并且在大多数情况下主要给出区域异构体8。加合物8和9的结构通过1 H,19 F和77 Se NMR光谱确定。化合物8容易被卤化,并且用镁或锌处理产物产生所需的多氟乙烯基硫化物和硒化物10。这些试剂的第二种合成路线是由(氟乙烯基硫代衍生物11与苯硫基或亚硒基卤化物。烯烃10e也由三氟乙醛的硒缩醛8t获得。