Asymmetric Fluorocyclization of Difluoroalkenes with Concomitant Formation of a Trifluoromethyl Group
作者:Chino Igarashi、Tomoya Mayumi、Hiromichi Egami、Yoshitaka Hamashima
DOI:10.1021/acs.orglett.4c00312
日期:2024.3.1
Asymmetric electrophilic fluorination of difluoroalkenes remains undeveloped because of the poor reactivity of difluoroalkenes with electrophiles. However, such reactions, if feasible, are expected to be useful for the synthesis of chiral heterocyclic compounds with a trifluoromethyl group at the stereogenic center. In this Letter, we disclose the first example of asymmetric fluoroamide cyclization
由于二氟烯烃与亲电子试剂的反应性差,二氟烯烃的不对称亲电氟化仍未开发。然而,如果可行的话,此类反应预计可用于合成在立构中心具有三氟甲基的手性杂环化合物。在这封信中,我们公开了使用我们的双阴离子相转移催化剂进行二氟烯烃不对称氟酰胺环化的第一个例子。该反应以合成有用的水平提供了独特的手性三氟甲基化恶唑啉衍生物。