A highly diastereoselective three-component inverse-electron-demand aza DielsâAlder reaction assisted by per(poly)fluoro-alkanesulfinamides is presented, providing a broad spectrum of highly functionalized piperidine derivatives with excellent endo/exo and facial diastereoselectivities. The electron-withdrawing perfluoroalkyl groups are crucial for the success of this reaction under mild conditions and facilitate monitoring the process and stereoselectivities of the reaction. The synthetic potential of these cycloadducts is also highlighted.
One-pot asymmetric reductive amination of ketones induced by polyfluoroalkanesulfinamide
作者:Kai Yang、Jin-Tao Liu
DOI:10.1016/j.jfluchem.2015.01.019
日期:2015.5
Using chiral 2-chloro-1,1,2,2-tetrafluoroethane-1-sulfinamide as the auxiliary, an efficient one-pot procedure for the asymmetricreductive amination of ketones was achieved in the presence of sodium borohydride. Both aromatic and aliphatic ketones reacted well to give the corresponding sulfinyl amides in good yields with excellent diastereoselectivities.
Synthesis of α-alkynyl perfluoroalkyl sulfoxides by the reaction of terminal alkynes and perfluoroalkanesulfinyl chlorides
作者:Qian Liu、Xiao-Bo Li、Min Jiang、Zhen-Jiang Liu、Jin-Tao Liu
DOI:10.1016/j.tet.2021.131994
日期:2021.3
The reaction of terminal alkynes with perfluoroalkanesulfinyl chlorides was achieved in the presence of n-BuLi/ZnCl2. A series of α-alkynyl perfluoroalkyl sulfoxides were synthesized for the first time in moderate to good yields via the nucleophilic substitution reaction of alkynylzinc chlorides formed in situ with perfluoroalkanesulfinyl chlorides.
Diastereoselectivity-switchable and regiospecific hetero Diels–Alder reaction of N-sulfinylper(poly)fluoroalkanesulfinamides with dienes
作者:Xiao-Jin Wang、Jin-Tao Liu
DOI:10.1016/j.tet.2005.05.022
日期:2005.7
reacted readily with dienes in methylene chloride at −78 °C to give the corresponding cycloadducts with complete regioselectivities and good diastereoselectivities. The diastereoselectivity of the reaction was switchable to the opposite under the catalysis of Lewis acids such as TiCl4 and SnCl4.
Synthesis of γ-Lactams via Pd(II)-Catalyzed C(sp<sup>3</sup>)–H Olefination Using a Self-Cleaving Polyfluoroethylsulfinyl Directing Group
作者:Nan-Qi Shao、Yu-Hao Chen、Chen Li、Dong-Hui Wang
DOI:10.1021/acs.orglett.0c00326
日期:2020.9.18
A monodentate directinggroup, 2-chlorotetrafluoroethylsulfinylmide (-NHSOCF2CF2Cl), for inert C(sp3)–H bond activation is reported. This directinggroup shows efficient ability in Pd(II)-catalyzed C(sp3)–H olefination. The desired olefination products undergo subsequent Michael addition and in situ expulsion of the auxiliary to provide the free NH γ-lactam products. Preliminary mechanistic studies