Organocatalytic asymmetric cross-aldol reaction of 2-chloroethoxy acetaldehyde: diversity-oriented synthesis of chiral substituted 1,4-dioxanes and morpholines
作者:Rajiv T. Sawant、Joanne Stevenson、Luke R. Odell、Per I. Arvidsson
DOI:10.1016/j.tetasy.2012.12.004
日期:2013.2
moderate diastereoselectivities (3.5–7:1). The 1,3-diols, obtained after the aldehyde reduction, represent highly functional intermediates that allow for further diversification into both chiral 1,4-dioxanes and morpholines, compounds that frequently display interesting biological activities.
在本文中,我们报道了使用(S)-(-)-α,α-二苯基-2-吡咯烷甲醇作为有机催化剂的2-氯乙氧基乙醛与芳族醛的简便有机催化不对称直接交联羟醛反应,得到抗-2-(2-氯乙氧基)-1-芳基丙烷-1,3-二醇具有出色的对映选择性(95–98%)和中等的非对映选择性(3.5–7:1)。醛还原后获得的1,3-二醇代表高功能中间体,可进一步多样化为手性1,4-二恶烷和吗啉,这些化合物通常表现出令人感兴趣的生物学活性。