A silver-catalyzed chlorination of benzylic, tertiary, and secondary C(sp3)–H bonds was developed. The reaction proceeded with as low as 0.2 mol % catalyst loading at room temperature under air atmosphere with synthetically useful functional group compatibility. The regioselectivity and reactivity tendencies suggest that the chlorination proceeded through a radical pathway, but an intermediate alkylsilver
synthesis of cyclicsulfinates and sulfinamides based on intramolecular homolyticsubstitution (SHi) at the sulfuratom by aryl or alkyl radicals is described. Both alkyl and benzofused compounds can be accessed directly from easily prepared acyclic precursors. Enantiomerically enriched sulfur‐based heterocycles were formed through an SHi process with inversion of configuration at the sulfuratom. Cyclization
描述了基于在硫原子上被芳基或烷基自由基的分子内均质取代(S H i)合成环状亚磺酸酯和亚磺酰胺的通用且有效的方法。烷基和苯并稠合的化合物都可以直接从容易制备的无环前体中获得。对映体富集的硫基杂环是通过S H i过程形成的,硫原子上的构型反转。前手性自由基的环化进行的立体化学结果各不相同,具体取决于传入自由基的大小。2-吡啶基和2-喹啉基会生成联芳基化合物,这是由于攻击芳基亚磺酸盐的邻位而不是亲硫取代引起的。
Hydrochlorination of Alkenes with Hydrochloric Acid
作者:Arnaud Olivier、Daniel S. Müller
DOI:10.1021/acs.oprd.3c00418
日期:2024.1.19
The hydrochlorination of alkenes with hydrogen chloride gas is typically limited to activated olefins. Herein, we present an innovative hydrochlorination approach utilizing hydrochloric acid within vigorously agitated solutions. Notably, the introduction of acetic acid was found to enhance the reaction rate. We substantiated the practicality of our method by conducting the hydrochlorination of styrene
POLYMERIZATION CATALYST COMPOSITION AND PROCESS FOR PRODUCTION OF POLYMER
申请人:Mitsui Chemicals, Inc.
公开号:EP1857471A1
公开(公告)日:2007-11-21
A polymerization catalyst composition for a radically polymerizable monomer of the present invention comprises a transition metal-containing phosphazenium composition which is produced by mixing a phosphazenium compound with a compound of a transition metal belonging to Groups 4 to 12 in the periodic table and an organic halogen compound.