THE REACTION OF METHYLIDENETRIPHENYLPHOSPHORANE WITH AROMATIC AND HETEROCYCLIC 1,2-DIKETONES

被引:0
作者
GABBUTT, CD [1 ]
HEPWORTH, JD [1 ]
HERON, BM [1 ]
机构
[1] UNIV CENT LANCASHIRE,DEPT CHEM,PRESTON PR1 2HE,ENGLAND
来源
JOURNAL OF CHEMICAL RESEARCH-S | 1995年 / 04期
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中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Whereas treatment of both 2,2,6-trimethylthiochromane-3,4-dione (1a) and 3,3,6,8-tetramethyl-1,2,3,4-tetrahydronaphthalene-1,2-dione (1b) with 1 mol equivalent of Ph3P=CH2 (2) affords a 1,2-methylidene ketone (3) which on reaction with a further mol equivalent of 2 gives a 1,2-diphenylphosphinoylethyl ketone (7), direct treatment of 1a and 1b with 2 mol equivalent of 2 causes a ring contraction to occur, resulting in a resonance-stabilised ylide (10).
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页码:118 / 118
页数:1
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