A novel Prins-alkynylation reaction for the synthesis of 4-phenacyl tetrahydropyrans
作者:J.S. Yadav、B.V. Subba Reddy、Y. Jayasudhan Reddy、Bh. Phaneendra Reddy、P. Adinarayana Reddy
DOI:10.1016/j.tetlet.2009.12.117
日期:2010.2
presence of BF3·OEt2/CuCl (10 mol % each) in dichloromethane under mild reaction conditions to afford 4-phenacyl tetrahydropyran derivatives in good yields. This method is highly stereoselective, affording cis-tetrahydropyrans exclusively. The salient features of this method are high conversions, mild reaction conditions, short reaction times, high selectivity, and operational simplicity.
在二氯甲烷中,在BF 3 ·OEt 2 / CuCl(各自为10 mol%)的存在下,醛,均烯丙基醇和炔烃进行平稳的Prins型环化反应,以高收率得到4-苯甲酰基四氢吡喃衍生物。该方法是高度立体选择性的,仅提供顺式-四氢吡喃。该方法的显着特征是高转化率,温和的反应条件,较短的反应时间,高选择性和操作简便性。