β-Fluoroamphetamines via the Stereoselective Synthesis of Benzylic Fluorides
摘要:
A range of substituted aryl epoxides undergo efficient ring-opening hydrofluorination upon treatment with 0.33 equiv of BF3 center dot OEt2 in CH2Cl2 at -20 degrees C to give the corresponding syn-fluorohydrins, consistent with a mechanism involving a stereoselective S(N)1-type epoxide ring-opening process. The benzylic fluoride products of these reactions are valuable templates for further elaboration, as demonstrated by the preparation of a range of aryl-substituted beta-fluoroamphetamines.
β-Fluoroamphetamines via the Stereoselective Synthesis of Benzylic Fluorides
摘要:
A range of substituted aryl epoxides undergo efficient ring-opening hydrofluorination upon treatment with 0.33 equiv of BF3 center dot OEt2 in CH2Cl2 at -20 degrees C to give the corresponding syn-fluorohydrins, consistent with a mechanism involving a stereoselective S(N)1-type epoxide ring-opening process. The benzylic fluoride products of these reactions are valuable templates for further elaboration, as demonstrated by the preparation of a range of aryl-substituted beta-fluoroamphetamines.
Dehydrogenation Based Asymmetric Epoxidation of Arylalkanes to Chiral Epoxides
作者:Yiting Su、Feng Yu、Guixia Liu、Zheng Huang
DOI:10.1002/cjoc.202200304
日期:2022.10
We report herein a formal asymmetricepoxidation of arylalkanes enabled by a one-pot dual-catalysts system comprising a pincer Ir catalyst for alkane dehydrogenation-alkene isomerization (AD-ISO) and a chiral ketone catalyst for asymmetric alkene epoxidation. This protocol provides a catalytic method for the synthesis of aryl epoxides in useful yields with high regio- and stereoselectivity directly
我们在此报道了一种通过一锅双催化剂系统实现的芳基烷烃的正式不对称环氧化,该系统包括用于烷烃脱氢-烯烃异构化 (AD-ISO) 的钳形 Ir 催化剂和用于不对称烯烃环氧化的手性酮催化剂。该协议提供了一种催化方法,用于直接从容易获得的烷基芳烃中合成具有高区域和立体选择性的有用产率的芳基环氧化物。环氧化产物的立体特异性衍生允许获得各种对映体富集的化合物。
Bravo, Pierfrancesco; Piovosi, Elena; Resnati, Giuseppe, Journal of Chemical Research, Miniprint, 1989, # 5, p. 1115 - 1147
作者:Bravo, Pierfrancesco、Piovosi, Elena、Resnati, Giuseppe
DOI:——
日期:——
An efficient approach to enantiomerically pure fluorhydrins
作者:Pierfrancesco Bravo、Giuseppe Resnati
DOI:10.1016/s0040-4039(00)96646-2
日期:1987.1
SHIMIZU, MAKOTO;YOSHIOKA, HIROSUKE, TETRAHEDRON LETT., 29,(1988) N 33, C. 4101-4104
作者:SHIMIZU, MAKOTO、YOSHIOKA, HIROSUKE
DOI:——
日期:——
β-Fluoroamphetamines via the Stereoselective Synthesis of Benzylic Fluorides
作者:Alexander J. Cresswell、Stephen G. Davies、James A. Lee、Paul M. Roberts、Angela J. Russell、James E. Thomson、Melloney J. Tyte
DOI:10.1021/ol100862s
日期:2010.7.2
A range of substituted aryl epoxides undergo efficient ring-opening hydrofluorination upon treatment with 0.33 equiv of BF3 center dot OEt2 in CH2Cl2 at -20 degrees C to give the corresponding syn-fluorohydrins, consistent with a mechanism involving a stereoselective S(N)1-type epoxide ring-opening process. The benzylic fluoride products of these reactions are valuable templates for further elaboration, as demonstrated by the preparation of a range of aryl-substituted beta-fluoroamphetamines.