A mild cyclodesulfurization of N-(2-hydroxyethyl)-N′-phenylthioureas to 2-phenylamino-2-oxazolines using TsCl/NaOH
摘要:
An efficient synthesis of 2-phenylamino-2-oxazolines 3 via cyclodesulfurization of N-(2-hydroxyethyl)-N ' -phenylthioureas 2 by a one-pot reaction using p-toluenesulfonyl chloride (TsCl) and NaOH in very good yields is described. (C) 2001 Elsevier Science Ltd. All rights reserved.
Investigation of the Mitsunobu Reaction of<i>N</i>-(2-Hydroxyethyl)-<i>N′</i>-Phenyl-Ureas
作者:Taek Hyeon Kim、Gue-Jae Lee、Mi-Hyun Cha
DOI:10.1080/00397919908086441
日期:1999.8
The Mitsunobu reaction of N-(2-hydroxyethyl)-ureas 1 using PPh3 and EtO2CN=NCO2Et led to the mixture of N- and O-alkylation products or a single isomer depending on the substrates.
l-Valinol and l-phenylalaninol-derived 2-phenylamino-2-oxazolines as chiral auxiliaries in asymmetric alkylations
作者:Gue-Jae Lee、Taek Hyeon Kim、Jae Nyoung Kim、Uk Lee
DOI:10.1016/s0957-4166(02)00044-7
日期:2002.2
Lithium enolates of N-acyl phenyliminooxazolidine auxiliaries reacted with alkyl halides to produce the α-alkylated products with very high diastereofacial selectivity (up to >99% d.e.). The products were readily cleaved by simple alkaline hydrolysis to give homochiral carboxylic acids and could also be directly converted to aldehydes and other acid derivatives such as esters and amides.
A mild cyclodesulfurization of N-(2-hydroxyethyl)-N′-phenylthioureas to 2-phenylamino-2-oxazolines using TsCl/NaOH
作者:Taek Hyeon Kim、Namgun Lee、Gue-Jae Lee、Jae Nyoung Kim
DOI:10.1016/s0040-4020(01)00682-2
日期:2001.8
An efficient synthesis of 2-phenylamino-2-oxazolines 3 via cyclodesulfurization of N-(2-hydroxyethyl)-N ' -phenylthioureas 2 by a one-pot reaction using p-toluenesulfonyl chloride (TsCl) and NaOH in very good yields is described. (C) 2001 Elsevier Science Ltd. All rights reserved.