In:
European Journal of Organic Chemistry, Wiley, Vol. 2007, No. 15 ( 2007-05), p. 2405-2412
Abstract:
Phosphorus‐based macrocycles with acetylenic scaffolds have been built from acetylene‐substituted phosphane oxides that were formed from diisopropylphosphoramidic dibromide ( 3 ) and an acetylenic Grignard reagent. The four‐ and six‐edged macrocycles 15 and 16 , in which the i Pr 2 NP(O) units are connected through 1,3‐butadiyne rods, were obtained from the monosilylated derivative of i Pr 2 NP(O)(C 2 H) 2 ( 7 ) by multiple acetylene coupling reactions under oxidative Hay conditions. Reaction of i Pr 2 NP(O)(Br) 2 ( 3 ) with lithiated 1,2‐diethynylbenzene gave a mixture of cis and trans monocyclic bis(phosphane oxide) 18 . An X‐ray crystal structure determination of the trans isomer shows the ring structure to adopt a puckered form.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Type of Medium:
Online Resource
ISSN:
1434-193X
,
1099-0690
DOI:
10.1002/ejoc.v2007:15
DOI:
10.1002/ejoc.200600877
Language:
English
Publisher:
Wiley
Publication Date:
2007
detail.hit.zdb_id:
1475010-7