Synthesis of a Weitz-type Organosulphur ?-Donor with a Cumulenic Bond: 1,2-Bis(2,6-diphenyl-4H-thiopyran-4-ylidene)ethene
The new, title organosulphur ?-donor and its bistetrafluoroborate have been synthesised from 2,6-diphenyl-2,3-dihydrothiopyran-4-one via the key intermediate 1,2-bis(2,6-diphenyl-2H-thiopyran-4-yl)ethyne.