1,5-asymmetric inductions in the reactions of 2-(2′,3′,4′,6′-tetra-O-acetyl-β-d-glucopyranosyloxy)benzaldehyde with Danishefsky's diene
作者:Richard P.C. Cousins、Anthony D.M. Curtis、Woan Chee Ding、Richard J. Stoodley
DOI:10.1016/0040-4039(95)01795-j
日期:1995.11
The title compounds react to give mainly a 9:1 mixture of the aldols 14 and 15 in THF in the presence of BF3.0Et(2). a 6:1 mixture of the cycloadducts 16 and 17 in THF in the presence of ZnCl2, and a 1:3 mixture of the cycloadducts 16 and 17 in toluene in the presence of Eu(fod)(3).
Mac Crae, Journal of the Chemical Society, 1903, vol. 83, p. 1325