Selective Functionalization of Aminoheterocycles by a Pyrylium Salt
作者:Daniel Moser、Yaya Duan、Feng Wang、Yuanhong Ma、Matthew J. O'Neill、Josep Cornella
DOI:10.1002/anie.201806271
日期:2018.8.20
The functionalization of aminoheterocycles by using a pyrylium tetrafluoroborate reagent (Pyry‐BF4) is presented. This reagent efficiently condenses with a great variety of heterocyclic amines and primes the C−N bond for nucleophilic aromatic substitution. More than 60 examples for the formation of C−O, C−N, C−S, or C−SO2R bonds are disclosed herein. In contrast to C−N activation through diazotization
The Preparation of Some 2-Pyridyl and 8-Quinolyl Phenyl Sulfides and Sulfones
作者:Harry C. Winter、Francis E. Reinhart
DOI:10.1021/ja01869a062
日期:1940.12
Takahashi et al., Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1942, vol. 62, p. 486; dtsch. Ref. S. 152.
作者:Takahashi et al.
DOI:——
日期:——
Green Chemical Synthesis of 2-Benzenesulfonyl-pyridine and Related Derivatives
作者:William G. Trankle、Michael E. Kopach
DOI:10.1021/op700060e
日期:2007.9.1
A practical synthesis of 2-benzenesulfonylpyridine, 1, is described which is a key starting material for the manufacture of an investigational new drug candidate at Eli Lilly and Company. An optimized green chemical process was developed which features a novel tandem SNAr/oxidation under mild conditions to produce the target sulfone, 1, in 86% yield and >99% purity. In addition, this novel, environmentally friendly methodology was found to be general for the synthesis of substituted aromatic pyridyl sulfides and sulfones.
Takahashi et al., Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1942, vol. 62, p. 486; dtsch. Ref. S. 152