SYNTHESIS OF SPIRO-TETRAHYDROBENZOTHIENO-1,2,3-SELENN THIADIAZOLES AND SPIRO-TETRA HYDROTHIO-CHROMENO-l,2,3-SELENA/THIADIAZOLES
摘要:
The title compounds have been prepared by exploiting alpha -ketomethylene group in spiro-tetrahydrobenzothienones/thiochromenones by oxidative cyclization with SeO2 and Hurd-Mori reaction process with SOCl2. The latter compounds have been obtained by the reaction of mereaptoacetic/propanoic acids with spiro-pyrimidinetriones and isoxazolidinediones followed by cyclodehydration with P2O5.
SYNTHESIS OF SPIRO-TETRAHYDROBENZOTHIENO-1,2,3-SELENN THIADIAZOLES AND SPIRO-TETRA HYDROTHIO-CHROMENO-l,2,3-SELENA/THIADIAZOLES
摘要:
The title compounds have been prepared by exploiting alpha -ketomethylene group in spiro-tetrahydrobenzothienones/thiochromenones by oxidative cyclization with SeO2 and Hurd-Mori reaction process with SOCl2. The latter compounds have been obtained by the reaction of mereaptoacetic/propanoic acids with spiro-pyrimidinetriones and isoxazolidinediones followed by cyclodehydration with P2O5.