Substrate-Controlled Diastereoselectivity Reversal in NHC-Catalyzed Cross-Benzoin Reactions Using <i>N</i>-Boc-<i>N</i>-Bn-Protected α-Amino Aldehydes
作者:Pouyan Haghshenas、J. Wilson Quail、Michel Gravel
DOI:10.1021/acs.joc.6b02568
日期:2016.12.16
demonstrated. The reaction is both chemoselective and syn-selective, making it complementary to the anti-selective cross-benzoin reaction of NHBoc-α-amino aldehydes. Good diastereoselectivity is obtained for a variety of amino aldehydes, including nonhindered ones. A Felkin–Anh model can be used to rationalize the observed diastereoselectivity.
证明了在与杂芳族醛的交叉安息香反应中利用N -Bn - N - Boc -α-氨基醛的有效性。该反应是化学选择性两者和顺式-选择性,使其互补于抗-选择性交叉安息香反应Ñ HBOC-α氨基醛。对于多种氨基醛,包括非受阻醛,都具有良好的非对映选择性。Felkin-Anh模型可用于合理化所观察到的非对映选择性。