Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Di-t-butylzinc adds easily to conjugated enynes . Only the acetylenic bond is involved in this reaction which proceeds via trans-addition. This regioselective and stereoselective addition leads to conjugated dienes . ... Le di-t-butyl-zinc s'additionne aisément aux énynes conjugués . ...