Iodine-catalyzed synthesis of <i>N</i>,<i>N</i>′-diaryl-<i>o</i>-phenylenediamines from cyclohexanones and anilines using DMSO and O<sub>2</sub> as oxidants
作者:Mingteng Xiong、Zhan Gao、Xiao Liang、Pengfei Cai、Heping Zhu、Yuanjiang Pan
DOI:10.1039/c8cc05320k
日期:——
A novel I2-catalyzed cross-dehydrogenative aromatization of cyclohexanones and anilines to synthesize N,N′-diaryl-o-phenylenediamines has been unprecedentedly developed with dimethyl sulfoxide and oxygen employed as mild terminal oxidants. To prove the rationality of the two separate dehydration steps of the proposed mechanism, a resulting I2-catalyzed cross-dehydrogenative aromatization of cyclohexenones
Oxidative Deselenylation with Sodium Perborate and Sodium Percarbonate
作者:George W. Kabalka、N. Kesavulu Reddy、Chatla Narayana
DOI:10.1080/00397919308009811
日期:1993.2
Abstract In the presence of acetic anhydride, both sodiumperborate and sodiumpercarbonate have been found to be effective reagents for the oxidation of α-phenylselenocarbonyl compounds to α,β,-unsaturated carbonyl compounds.
Unsaturation of ketones, nitriles and lactams with methyl phenylsulfinate
作者:James E. Resek、A.I. Meyers
DOI:10.1016/0040-4039(95)01461-p
日期:1995.9
An improvedsynthesis of methyl phenylsulfinate 2 by treatment of diphenyl disulfide with bromine in the presence of methanol has been developed. Use of this reagent in the preparation of α,β-unsaturated ketones, nitriles and lactams is described.
Bidentate Nitrogen-Ligated I(V) Reagents, Bi(<i>N</i>)-HVIs: Preparation, Stability, Structure, and Reactivity
作者:Xiao Xiao、Jessica M. Roth、Nathaniel S. Greenwood、Maria K. Velopolcek、Jordan Aguirre、Mona Jalali、Alireza Ariafard、Sarah E. Wengryniuk
DOI:10.1021/acs.joc.1c00375
日期:2021.5.7
class of I(V) reagents, Bi(N)-HVIs, possessing datively bound bidentate nitrogen ligands on the iodine center. Bi(N)-HVIs display favorable safety profiles, improved solubility, and comparable to superior oxidative reactivity relative to common I(V) reagents. The highly modular synthesis and in situgeneration of Bi(N)-HVIs provides a novel and convenient screening platform for I(V) reagent and reaction
高价碘 (V) 试剂是一类强效有机氧化剂。虽然 I(V) 化合物戴斯-马丁高碘烷和 IBX 的使用很广泛,但此类试剂长期以来一直受到溶解度和稳定性问题的困扰。人们为衍生这些支架以调节反应性和物理性质做出了广泛的努力,但仍然存在相当大的创新空间。在此,我们描述了一种新兴的 I(V) 试剂 Bi(N)-HVI 的制备、热稳定性、优化的几何结构和合成实用性,Bi( N )-HVI 在碘中心上具有配位结合的二齿氮配体。 Bi( N )-HVI 表现出良好的安全性、更高的溶解度,并且相对于常见的 I(V) 试剂具有优异的氧化反应性。 Bi( N )-HVI的高度模块化合成和原位生成为I(V)试剂和反应开发提供了新颖且便捷的筛选平台。
Chemical synthons and intermediates
申请人:——
公开号:US20040138485A1
公开(公告)日:2004-07-15
The invention provides novel six and seven-carbon termini-differentiated polypropionate stereotetrads and stereopentads useful in syntheses of natural products. The invention also provides a novel alkylative sulfenylation-desulfonylation process that efficiently transforms enantiopure epoxyvinyl sulfones to syn and anti dienylsulfides in two operations.