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Cyclopropanation of areno-condensed 4H-pyrans with dihalocarbenes
- Source :
- Chemistry of Heterocyclic Compounds. 56:1417-1422
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- The addition of dihalocarbenes to 1H-benzo[f]chromenes and 4H-chromenes gave a number of dihalotetrahydro(benzo)cyclopropa[b]-chromenes containing donor and acceptor substituents at different positions. It was found that in the case of 1,3-disubstituted 1H-benzo[f]-chromenes, the reaction proceeds diastereoselectively with the formation of trans-isomers. 12H,13H-7a,12a-Methanobenzo[f]indeno-[1,2-b]chromene and 12,13-dihydro-14H-7a,13a-methanodibenzo[a,h]xanthene, representatives of new heterocyclic systems, were obtained.
Details
- ISSN :
- 15738353 and 00093122
- Volume :
- 56
- Database :
- OpenAIRE
- Journal :
- Chemistry of Heterocyclic Compounds
- Accession number :
- edsair.doi...........6a646654c28bcfa2ce2ab65c845d483b