A series of optically active β-aryloxy alcohols and β-arylthiol alcohols were synthesized directly by asymmetric transfer hydrogenation of the corresponding β-carbonyl ethers or β-carbonyl sulfides in excellent yields (up to 99%) and excellent enantioselectivity (up to 100% ee) under mild reaction conditions.
Die Diamidinedes2-Phenyl-thionaphthens mit den Amidinogruppen in 4′.6-(7), 4′.5-(19e), 3′.6-(12g) und 3′.5-Stellung (14g) werden synthetisiert. Vom 4′.6- und vom 4′.5-Diamidin werden die 1.1-Dioxide (20b, 22b) sowie deren 2.3-Dihydro-Derivate (21b, 23b) hergestellt. - Das 4′.6- und das 4′.5-Diamidin zeigen im Mäuseversuch ein ausgezeichnetes trypanocides Wirkungsspektrum (Tab. 1), worin die 4′.6-Verbindung
Catalyst-Free Difunctionalization of Activated Alkenes in Water: Efficient Synthesis of β-Keto Sulfides and Sulfones
作者:Huamin Wang、Guangyu Wang、Qingquan Lu、Chien-Wei Chiang、Pan Peng、Jiufu Zhou、Aiwen Lei
DOI:10.1002/chem.201603041
日期:2016.10.4
Difunctionalization of activated alkenes, a powerful strategy in chemical synthesis, has been accomplished for direct synthesis of a series of β‐keto sulfides and β‐keto sulfones. The transformation, mediated by O2, proceeds smoothly in water and without any catalyst. Prominent advantages of this method include mild reaction conditions, purification simplicity, and gram‐scale synthesis, underlining
Shingare; Siddiqui, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1989, vol. 28, # 2, p. 154 - 158
作者:Shingare、Siddiqui
DOI:——
日期:——
Highly efficient synthesis of chiral β-hydroxy sulfides with high enantiomeric purity via CBS-oxazaborolidine-catalyzed borane reduction
作者:Byung Tae Cho、Ok Kyoung Choi、Dong Jun Kim
DOI:10.1016/s0957-4166(02)00193-3
日期:2002.5
A simple and efficient synthesis of chiral beta-hydroxy p-tolylsulfides with high enantiomeric purity by CBS-oxazaborolidine-catalyzed asymmetric borane reduction of beta-keto p-tolyisulfides using N-ethyl-N-isopropylaniline-borane complex as the borane carrier is reported. (C) 2002 Elsevier Science Ltd. All rights reserved.