Stereoinversion of Unactivated Alcohols by Tethered Sulfonamides
作者:Paul T. Marcyk、Latisha R. Jefferies、Deyaa I. AbuSalim、Maren Pink、Mu‐Hyun Baik、Silas P. Cook
DOI:10.1002/anie.201812894
日期:2019.2.4
remains an undeveloped area of organic synthesis. Moreover, catalytic activation of this difficult electrophile with predictable stereo-outcomes presents an even more formidable challenge. Described herein is a simple iron-based catalyst system which provides the mild, direct conversion of secondary and tertiary alcohols to sulfonamides. Starting fromenantioenriched alcohols, the intramolecular variant
ULTRAMINE: A High-Capacity Polyethylene-Imine-Based Polymer and Its Application as a Scavenger Resin
作者:Michael Roice、S�ren F. Christensen、Morten Meldal
DOI:10.1002/chem.200400314
日期:2004.9.20
polyethylene-imine resin (ULTRAMINE) is described, and itsapplication as a scavengerresin in various acylation reactions is demonstrated. The inverse suspension polymerization technique was used for the synthesis of well-defined spherical polymer beads. Polymer beads with different cross-linking densities were synthesized according to the degree of acryloylation of the polyethylene-imine polymer. The resin was
An Efficient Method for the Preparation of Monoalkylated Sulfonamides from Unsubstituted Sulfonamides and Alkyl Diphenylphosphinites by Oxidation–Reduction Condensation Using Trimethylsilylmethyl Azide
作者:Hidenori Aoki、Kiichi Kuroda、Teruaki Mukaiyama
DOI:10.1246/cl.2005.1266
日期:2005.9
An efficientmethod for monoalkylation of unsubstituted sulfonamides was established by usingalkyl diphenylphosphinites, sulfonamides and trimethylsilylmethyl azide and the monoalkylated sulfonami...
Campbell; Campbell; Salm, Proceedings of the Indiana Academy of Science, 1948, vol. 57, p. 100
作者:Campbell、Campbell、Salm
DOI:——
日期:——
A Hydrazone-Based <i>exo</i>
-Directing-Group Strategy for β C−H Oxidation of Aliphatic Amines
作者:Zhongxing Huang、Chengpeng Wang、Guangbin Dong
DOI:10.1002/anie.201600912
日期:2016.4.18
group (DG) strategy developed for the functionalization of unactivated primary β C−H bonds of aliphaticamines. Conveniently synthesized from protected primary amines, the hydrazone DGs are shown to site‐selectively promote the β‐acetoxylation and tosyloxylation via five‐membered exo‐palladacycles. Amines with a wide scope of skeletons and functional groups are tolerated. Moreover, the hydrazone DG