Synthesis of functionalized pyrrolidines from N-(benzylidene)- and N(alkylidene)-homoallylamines
摘要:
N-(Benzylidene)- and N-(alkylidene)-homoallylamines are cyclised by electrophiles, e,g. bromine or phenylselenenyl bromide, and by subsequent reduction to the corresponding 3-functionalised pyrrolidines; the stereochemistry was investigated, and reductive removal of the 3(or 4)-bromo- and 3(or 4)-phenylseleno-substituents was accomplished.
Electroreductive Carbofunctionalization of Alkenes with Alkyl Bromides via a Radical-Polar Crossover Mechanism
作者:Wen Zhang、Song Lin
DOI:10.1021/jacs.0c08532
日期:2020.12.9
variety of alkene functionalization reactions, most of which proceed via an anodic oxidation pathway. In this report, we further expand the scope of electrochemistry to the reductive functionalization of alkenes. In particular, the strategic choice of reagents and reaction conditions enabled a radical-polar crossover pathway wherein two distinct electrophiles can be added across an alkene in a highly
Novel pyrrolidine, piperidine and homopiperidinecarboxamide and thiocarboxamide compounds having the formula: ##STR1## wherein X is --S--, --S(O)-- or --S(O).sub.2 --; A is a loweralkalene chain and A.sup.1 and A.sup.2 are alkalene chains when p and d are one; R, R.sup.1 and R.sup.2 are hydrogen, loweralkyl, phenyl cycloalkyl or phenylalkyl and R.sup.1 and R.sup.2 may form a heterocyclic residue with the adjacent nitrogen atom; Q is a selected aromatic radical, and the pharmaceutically acceptable acid addition salts useful as cardiac antiarrhythmia agents are disclosed. Novel chemical intermediates, unsubstituted on pyrrolidine, piperidine and homopiperidine nitrogen but with --(A.sup.2).sub.p --X--(A.sup.2).sub.d --Q side chain are also disclosed.
N-[(Amino)Alkyl]-1-pyrrolidine, 1-piperidine and 1-homopiperidinecarboxamides (and thiocarboxamides) with sulphur linked substitution in the 2, 3 or 4-position
申请人:A.H. ROBINS COMPANY, INCORPORATED
公开号:EP0160436A2
公开(公告)日:1985-11-06
Pyrrolidine, piperidine and homopiperidine- carboxamide and thiocarboxamide compounds of the formula:
wherein X is -S-, -S(0)- or -S(0)2-; A is a loweralkalene chain and A1 and A2 are alkalene chains when p and d are one; R, R1 and R2 are hydrogen, loweralkyl, phenyl cycloalkyl or phenylalkyl and R1 and R2 may form a heterocyclic residue with the adjacent nitrogen atom; Q is a selected aromatic radical, and the pharmaceutically acceptable acid addition salts are useful as cardiac antiarrhythmia agents.
Chemical intermediates, unsubstituted on pyrrolidine, piperidine and homopiperidine nitrogen but with the -(A2)p-X-(A2)d-Q side chain are also disclosed.
申请人:A.H. ROBINS COMPANY, INCORPORATED
(a Delaware corporation)
公开号:EP0299663A2
公开(公告)日:1989-01-18
Aromatic tetrahydroazepinones and thiones having the formula:
wherein
Q is carbon or nitrogen;
B is oxygen or sulfur;
R is loweralkyl, cycloalkyl or phenylloweralkyl;
Z is an amino or a heterocyclic amino containing radical; and
Y is halo, loweralkyl, loweralkoxy, diloweralkylamino, nitro, phenyl or trifluorophenyl;
and having antihistaminic utility, a process for the preparation thereof and chemical intermediates therefor are disclosed.
具有以下式子的芳香族四氢氮杂卓酮和硫酮
其中
Q 是碳或氮
B是氧或硫
R是低级烷基、环烷基或苯基低级烷基
Z 是氨基或含杂环氨基的基;以及
Y 是卤代、低级烷基、低级烷氧基、稀低级烷基氨基、硝基、苯基或三氟苯基;
本发明公开了具有抗组胺效用及其制备方法和化学中间体。
Stereocontrolled Synthesis of 1,2-Dialkyl-4-halopyrrolidines through PhSeX-Induced Cyclization of Secondary Homoallylamines