Adrenoceptor blocking agents. 2. 2-(.alpha.-Hydroxyarylmethyl)-3,3-dimethylaziridines, a new class of selective .beta.2-adrenoceptor antagonists
作者:Padam C. Jain、Y. Khandelwal、Onkar N. Tripathi
DOI:10.1021/jm00199a012
日期:1978.1
threo-2-[alpha-hydroxy(2-naphthyl)methyl]- and 2-[alpha-hydroxy(3,4-dichlorobenzyl)]-3,3-dimethylaziridines (1d and 1c) have been prepared as conformationally restricted analogues of beta-adrenoceptor blockingagents like dichloroisoproterenol (DCI) and pronethalol. The aziridine analogues 1 except possibly 1c are competitive antagonists of isoproterenol-induced response on a guinea pig tracheal chain preparation
Tunable Lewis Basicity and Nucleophilicity of Water against α,α-Dihalo-β-acetoxyketones for the Selective Synthesis of α-Haloenones and 1,2-Diketones
作者:Santu Sadhukhan、Beeraiah Baire
DOI:10.1021/acs.joc.1c02780
日期:2022.5.6
competitive nucleophilicity and Lewis basicity of water against novel building blocks α,α-dihalo-β-acetoxyketones (possessing a tertiary acetate) have been reported. This distinct reactivity resulted in the formation of two competitive and different products 1,2-diketones and α-haloenones from a common intermediate α,α-dihalo-β-acetoxyketones through the nucleophilicity and Lewis basicity of water, respectively
作者:Dong-Hang Tan、Zhi-Hao Chen、Ling Yang、Chang-Ting Li、Fang-Hai Tu、Qingjiang Li、Honggen Wang
DOI:10.1007/s11426-021-1188-x
日期:2022.4
The semipinacol rearrangement is one of the classic yet useful synthetic tools in organic synthesis. However, semipinacol rearrangements involving heteroatom-migration are rare. Reported herein is a boryl-migratory semipinacol rearrangement of α-hydroxyallylboronates and α-hydroxypropargylboronates triggered by diverse halogen-, oxygen-, sulfur- and selenium-containing electrophiles. The protocol leads