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2,4‐Diphosphoranediyl‐1,3‐diphosphetanes
Author(s) -
Schrödel HansPeter,
Schmidpeter Alfred
Publication year - 1997
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19971301027
Subject(s) - chemistry , protonation , medicinal chemistry , ring (chemistry) , dissociation (chemistry) , yield (engineering) , chloride , metal , stereochemistry , lewis acids and bases , organic chemistry , catalysis , ion , materials science , metallurgy
The 1,3‐dichloro‐ and 1,3‐dibromo‐substituted title compounds 5b, c result from the condensation of triphenylphosphonium‐bis(trimethylsily1)methylide 1 with PC1 3 and PBr 3 . The chloro derivative 5b undergoes a variety of single and double substitution reactions, of which some have merely been tested and others have been made preparative use of. The substitution of one chloride by an ylidyl, amino, phosphino, or metal carbonyl group is accompanied by the spontaneous dissociation of the other P‐CI bond to yield the, 1,3‐diphosphetenium chlorides 14/15, 19, 31 and 36 , respectively. In other cases ( 9, 27, 32 ) dissociation can be achieved by means of a Lewis acid. Protonation of 5b occurs at the carbon ring members; methylation and formation of transition metal complexes occurs at a phosphorus ring member. PCl 3 degrades the four‐membered ring of 5b or enlarges the ring to yield 3,5‐diphosphoranediyl‐l,2,4‐triphospholane derivatives 39, 40, 42.