ZnCl2 catalyzed cascade conjugative alkynylation/6-endo-dig cyclisation of N,N-dimethyl barbituric acid derived alkenes under ultrasonic irradiation: An improved, base & column-free access to pyrano[2,3-d]pyrimidine-2,4(3H,5H)-diones
Titel:
ZnCl2 catalyzed cascade conjugative alkynylation/6-endo-dig cyclisation of N,N-dimethyl barbituric acid derived alkenes under ultrasonic irradiation: An improved, base & column-free access to pyrano[2,3-d]pyrimidine-2,4(3H,5H)-diones