METHOD FOR PRODUCING CYCLIC SULFONIC ACID ESTER AND INTERMEDIATE THEREOF
申请人:Kuramoto Ayako
公开号:US20120130089A1
公开(公告)日:2012-05-24
The present invention is directed to provide an efficient production method which is capable of not only obtaining a cyclic sulfonic acid ester (sultone) at low cost and in high yield, but also the sulfonic acid ester (sultone) stably even in a commercial scale. The present invention relates to a method for producing hydroxysultone comprising a first step where a diol having a specified structure and a thionyl halide are reacted to obtain a cyclic sulfite having a specified structure, and a second step where the cyclic sulfite is reacted with water or/and alcohol; a method for producing an unsaturated sultone having a specified structure comprising a third step where a hydroxylsultone having a specified structure is reacted with an acid halide or an acid anhydride to obtain an intermediate, subsequently the intermediate is treated with a base; as well as a cyclic sulfite having a specified structure.
Time and Atom Economical Regio‐ and Chemoselective Radical Cyclization of Unactivated 1,6‐Enynes Under Metal‐ and Oxidant‐Free Conditions
作者:Mohana Reddy Mutra、Jing Li、Yu‐Ting Chen、Jeh‐Jeng Wang
DOI:10.1002/chem.202200742
日期:2022.7.26
Chemical economics! Highly substituted five-membered heterocyclic compounds were synthesized from unactivated 1,6-enynes and sulfonyl halides undermetal, additive-free reaction conditions. These transformations can minimize chemical waste, save time, and simplify practical aspects compared to exiting protocols.
Photoinduced Radical Cyclization of 1,6‐Diynes: Rapid Access to Highly Substituted Carbocyclic and Heterocyclic Compounds
作者:Mohana Reddy Mutra、Yu‐Ting Chen、Jeh‐Jeng Wang
DOI:10.1002/adsc.202300013
日期:——
sulfonyl radical-triggered cyclization of 1,6-dynes without metals, oxidants, or additives. During the reaction, three new bonds are formed (−SO2−C, C−C, and C−I/C−Se−) under mild conditions, with excellent selectivity. The conversion is temporally and atomically economical and is easy to handle even on a gram scale. Detailed mechanistic studies showed that the reaction proceeds via a radical pathway
1,3-propanesultone derivative useful in the preparation of a 1,3-propenesultone derivative
申请人:Wako Pure Chemical Industries, Ltd.
公开号:EP2757102A1
公开(公告)日:2014-07-23
The present invention is directed to provide an efficient production method which is capable of not only obtaining a cyclic sulfonic acid ester (sultone) at low cost and in high yield, but also the sulfonic acid ester (sultone) stably even in a commercial scale. The present invention relates to a method for producing hydroxysultone comprising a first step where a diol having a specified structure and a thionyl halide are reacted to obtain a cyclic sulfite having a specified structure, and a second step where the cyclic sulfite is reacted with water or/and alcohol; a method for producing an unsaturated sultone having a specified structure comprising a third step where a hydroxylsultone having a specified structure is reacted with an acid halide or an acid anhydride to obtain an intermediate, subsequently the intermediate is treated with a base; as well as a cyclic sulfite having a specified structure.
A visible-light-promoted radical gem-difunctionalization of trifluorodiazoethane with RSO2X (X = SeR′, I) for the synthesis of α-seleno or α-iodo trifluoroethyl sulfones is described. This atom-economical reaction is external-photocatalyst- and additive-free and uses nontoxic ethyl acetate as the solvent. The resultant products, which incorporate sulfonyl, trifluoromethyl, and iodo or selenyl functional