A general method for the preparation of perfluoroalkanesulfonyl chlorides
摘要:
A mild two-step synthesis of perfluoroalkanesulfonyl chlorides starting from perfluoroalkyl iodides has been developed. Reaction of perfluoroalkyl iodides with sodium dithionite gave sodium perfluoroalkanesulfinate salts which were converted into perfluoroalkanesulfonyl chlorides in 25-73% yield (two steps) using N-chlorosuccinimide. (c) 2005 Elsevier B.V. All rights reserved.
The enantioselectivereactions of lithiated benzyl trifluoromethyl sulfones with a substoichiometric amount of a bis(oxazoline) and various aldehydes is disclosed. The products were formed with excellent diastereo- and enantioselectivities. Fluorination of the sulfone with N-fluorobenzenesulfonimide and a stoichiometric amount of a bis(oxazoline) gave products with extremely high enantioselectivities
公开了锂化的苄基三氟甲基砜与亚化学计量的双(恶唑啉)和各种醛的对映选择性反应。形成的产物具有优异的非对映选择性和对映选择性。用N-氟苯磺酰亚胺和化学计量的双(恶唑啉)对砜进行氟化,得到的产物具有极高的对映选择性(高达99%ee; ee =对映体过量)。确认对映选择性反应通过动态热力学拆分途径进行。
A general method for the preparation of perfluoroalkanesulfonyl chlorides
作者:Peter J.H. Scott、Ian B. Campbell、Patrick G. Steel
DOI:10.1016/j.jfluchem.2005.05.007
日期:2005.8
A mild two-step synthesis of perfluoroalkanesulfonyl chlorides starting from perfluoroalkyl iodides has been developed. Reaction of perfluoroalkyl iodides with sodium dithionite gave sodium perfluoroalkanesulfinate salts which were converted into perfluoroalkanesulfonyl chlorides in 25-73% yield (two steps) using N-chlorosuccinimide. (c) 2005 Elsevier B.V. All rights reserved.