scope of this alkynylation reaction is also discussed. Moreover, the development of a new approach for the synthesis of optically active tertiary benzylpropargyl alcohols is described, discussing the possible stereocourse of the reaction so as the influence of the ether 18-crown-6 and steric importance of acetylenic substituent.
由不对称加成的非对映体富集的仲苄基炔丙基醇的生成邻位通过形成C
SP-C
SP的-sulfinylbenzyl碳负离子至sulfonylacetylene衍
生物3键进行说明。该反应通过不寻常的邻亚磺酰基苄基碳负离子的α-攻击(抗迈克尔加成反应)进行,然后消除芳基磺酰基部分。还讨论了该炔基化反应的范围。此外,描述了合成光学活性的叔苄基
丙炔醇的新方法的发展,讨论了反应的可能立体过程,如醚18-crown-6的影响和炔基取代基的空间重要性。