Ring expansion in the addition of dichlorocarbene to 2, 5-dihydro-1H-phosphole 1-oxides

…, I Petnehazy, P Miklos, A Almasy, G Toth…

Index: Keglevich, Gyoergy; Petnehazy, Imre; Miklos, Peter; Almasy, Attila; Toth, Gabor; et al. Journal of Organic Chemistry, 1987 , vol. 52, # 18 p. 3983 - 3986

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Citation Number: 57

Abstract

While the addition of dichlorocarbene to 2, 5-dihydro-3-methyl-lH-phosphole 1-oxides (la-d) carried out under phase-transfer catalytic conditions gave 6, 6-dichloro-l-methyl-3- phosphabicyclo [3. lO] hexane 1-oxides (za-d), the 3, 4-dimethyl-l-phenyl analogue (3a) yielded, via four consecutive steps including two ring expansions, 4, 5-dichloro-3, 6-dimethyl- l-phenylphosphacycl~ hepta-2, 4, 6-triene 1-oxide (7a). In the reaction of 2, 5-dihydro-l- ...