Ultrasonically induced conjugate addition of iodides to electron-deficient olefins and its application to the synthesis of side-chain analogs of the hormone 1.alpha.,25-dihydroxyvitamin D3
Ultrasonically induced conjugate addition of iodides to electron-deficient olefins and its application to the synthesis of side-chain analogs of the hormone 1.alpha.,25-dihydroxyvitamin D3