Efficient methods of synthesis of unsaturated alcohols and ketones by allylation of Favorsky reaction products under phase transfer conditions
作者:V. A. Potapov、T. I. Yaroshenko、V. A. Panov、M. V. Musalov、A. G. Khabibulina、M. V. Musalova、S. V. Amosova
DOI:10.1134/s1070428016120034
日期:2016.12
Allylation of the Favorsky reaction products with allyl halides under phase-transfer catalysis in the system CuI–K2CO3–Na2SO3–BTEAC–H2O–C6H6 afforded the corresponding allylpropargyl alcohols in high yields (87–96%). The procedure is practical and scalable (more than 50 g of the target product can be prepared in a single run) and is characterized by high selectivity. Oxidation of secondary allylpropargyl
在相转移催化下,CuI–K 2 CO 3 –Na 2 SO 3 –BTEAC–H 2 O–C 6 H 6体系中的Favorsky反应产物与烯丙基卤的烯丙基化可提供高收率的相应的烯丙基炔丙醇(87– 96%)。该方法是实用且可扩展的(一次可制备50克以上目标产品),并且具有高选择性的特点。在室温下,用二氧化锰在无水乙腈中氧化仲烯丙基炔丙醇,可得到75-81%的烯丙基炔酮。
Direct Synthesis of Trisubstituted Isoxazoles through Gold-Catalyzed Domino Reaction of Alkynyl Oxime Ethers
Alkynyl oxime ether underwent a gold-catalyzed domino reaction involving cyclization and subsequent Claisen-type rearrangement to afford trisubstitutedisoxazoles in a direct, efficient, and regioselective manner. The products were successfully applied to the synthesis of unusual heterocycles as an illustration of the potential utility of the reaction.