Enantioselective preparation of C2-symmetrical 1,4-diols
作者:Stephan Vettel、Paul Knochel
DOI:10.1016/s0040-4039(00)78200-1
日期:1994.8
addition of functionalized dialkylzincs to the γ-alkoxyaldehydes 5, 6 and 7 provides 1,4-diols 1–3 with 73–99 %ee. After a simple reaction sequence, these diols are converted to chiral γ-alkoxyaldehydes which undergo a second catalytic enantioselective addition of the same diorganozinc providing C2-symmetrical 1,4-diols 10a–f with excellent diastereoselectivity (up to 97 : 3).