nBu2Sn(SPh)2;Dibutyl-bis-phenylmercapto-zinn;Di-n-butyl-zinn-bis-thiophenolat;bis-(phenylthio)-dibutylstannane;thiophenol; dibutyl tin bis-benzenethiolate;Thiophenol; Dibutylzinn-bis-benzenthiolat;Benzenethiolate;dibutyltin(2+)
Monothioacetals are obtained by treating the corresponding acetals with organotin thiophenoxides in the presence of BF2·OEt2. The reaction proceeds under mild conditions to provide the desired compounds with high selectivity.
Exposure of thiostannane to acetyl or methyl glycosides in the presence of a catalytic amount of Bu2Sn(OTf)2 provides thioglycosides in good yields. Selenoglycosidation is achieved in a like manner by use of selenostannane.
3,4-Dihydro-2H-pyran (DHP) was efficiently transformed into 4-thiophenyl-3,4-dihydro-2H-pyran. This intermediate was converted to the corresponding 1,3-O,Sallylic carbanion with t-butyllithium and selectively alkylated at the carbon a to the sulfur with alkyl halides, an epoxide, and an aldehyde. An one-pot oxidative elimination of the sulfur fragment using vanadium pentoxide generates the desired beta-substituted alpha,beta-unsaturated delta-unsaturated-valero lactone.
Activation and synthetic applications of thiostannanes