cyclopropanes (DAC) has been suggested. It involves the use of isomeric styrylmalonates as alternative sources of reactive intermediates. The efficiency of the approach has been demonstrated in reactions with aromatic aldehydes. As a result, a new process for construction of the 5,6-dihydropyran-2-one skeleton has been developed. It efficiently occurs with high diastereoselectivity in the presence of BF3·Et2O;
已经提出了一种改变供体-受体
环丙烷(
DAC)反应性的新策略。它涉及使用异构的
丙二酸苯乙烯基
丙酸酯作为反应性
中间体的替代来源。在与芳族醛的反应中已经证明了该方法的效率。结果,已经开发了构建5,6-二
氢吡喃-2-
酮骨架的新方法。在BF 3 ·Et 2 O的存在下,它具有高非对映选择性地有效地发生。可以容易地通过结晶分离产物。已经证明了随后在合成中使用所得的二
氢吡喃酮,可方便地获得具有广泛分子多样性的各种化合物。