作者:Ahmad Farouk Eweas
DOI:10.1080/00397910801929358
日期:2008.4.1
The ring-closure metathesis of the diene (2S, 3R, 4S)-1-(tert-butyldiphenylsilyloxy)-2,4- dimethylhex-5-en-3-yl acrylate produced the dihydropyrone with the correct stereochemistry for Soraphen A(1 alpha) synthesis. The C2,C3 stereocenters were introduced by the addition of the (Z)-crotyl-n-butylstannane to the beta-alkoxyaldehyde( S)-3-(benzyloxy)-2-methylpropanal in presence of TiCl4 as a chelating catalyst to give the desired anti,syn homoallyic alcohol (2S, 3R, 4S)-1-(tert-butyldiphenylsilyloxy)2,4- dimethylhex-5-en-3-ol.