微波辅助合成2-芳基-2-恶唑啉,5,6-二氢-4 H -1,3-恶嗪和4,5,6,7-四氢-1,3-恶氮杂s
摘要:
提出了通过微波辅助多磷酸(PPA)酯促进的ω-氨基醇的环化反应合成5至7元环亚氨基醚的第一个通用程序。使用聚磷酸乙酯/ CHCl 3有效地制备了2-芳基-2-恶唑啉和5,6-二氢-4 H -1,3-恶嗪。在无溶剂条件下,多磷酸三甲基甲硅烷基酯可合成迄今未报道的4,5,6,7-四氢-1,3-氧杂氮杂pine。该方法具有良好的收率和优异的收率,并且反应时间短。在手性底物中研究了PPA酯的反应机理和作用。
Willgerodt–Kindler reaction-driven one pot solventless entry to 2-oxazolines
作者:Shivani Bansal、Poonam Gupta、A. K. Halve
DOI:10.1080/10426507.2015.1135151
日期:2016.7.2
efficient and green protocol for the synthesis of 2-oxazolines by the reaction of aromatic nitriles with β-aminoalcohols using sulfur under solvent-free conditions. The reaction occurs via the Willgerodt–Kindler mechanism followed by transamidation and dehydrosulfuration. This methodology offers several advantages such as good yields, mild and practical reactionconditions, simple work-up procedure, and
Benzoxazol- oder Oxazolingruppenhaltige Polyarylsulfide
申请人:BAYER AG
公开号:EP0332997A2
公开(公告)日:1989-09-20
Die Erfindung betrifft neue Copolyarylensulfide, vorzugsweise Copolyphenylensulfide aus Dihalogenaromaten und Benzoxazol- oder Oxazolingruppen-haltigen Comonomeren.
A Mild and Efficient Synthesis of 2-Oxazolines via Transamidation–Cyclodehydrosulfurisation of Thioamides with 2-Aminoethanol
作者:Uma Pathak、D. Goud
DOI:10.1055/s-0032-1317341
日期:——
Transamidation of thioamides with 2-aminoethanol, followed by cyclodehydrosulfurisation of the resultant N-(beta-hydroxyethyl)thioamides, has been utilised for the mild and efficient synthesis of 2-oxazolines. The developed protocol was found to be of general applicability.
PRIDGEN, L. N., J. ORG. CHEM., 1982, 47, N 22, 4319-4323