Ti(II)-Mediated Conversion of α-Heterosubstituted (O, N, S) Nitriles to Functionalized Cyclopropylamines. Effect of Chelation on the Cyclopropanation Step
摘要:
alpha-Alkoxy, amino-, and thio nitriles under-go a Ti(II)-mediated coupling with Grignard reagents to afford heterofunctionalized cyclopropylamines. A chelation effect appears to be generally responsible for the spontaneous contraction of the intermediate azatitanacycle leading to cyclopropane. By using the described reaction, 1-amino-cyclopropanecarboxylic acids were prepared in four steps, in good overall yields, from the readily available benzyloxy-acetonitrile.
Substituierte Cycloalkylderivate zur Behandlung von Atemswegerkrankungen
申请人:Boehringer Ingelheim Pharma GmbH & Co.KG
公开号:EP1595873A1
公开(公告)日:2005-11-16
Die vorliegende Erfindung betrifft Verbindungen der Formel 1
worin die Gruppen R1, R2, R3, R4, R5, R6, R7, R8, n, m und X die in den Ansprüchen und in der Beschreibung genannten Bedeutungen haben können, sowie deren Verwendung als Arzneimittel, insbesondere zur Behandlung von entzündlichen und obstruktiven Atemwegserkrankungen.
Substituted cycloalkyl derivatives, process for the manufacture thereof and use thereof as medicament
申请人:Konetzki Ingo
公开号:US20050261286A1
公开(公告)日:2005-11-24
The present invention relates to compounds of formula 1
wherein the groups R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, R
8
, n, m and X may have the meanings given in the claims and in the specification, and the use thereof as pharmaceutical compositions, particularly for the treatment of inflammatory and obstructive respiratory complaints.