2,4,4,6-Tetrabromo-2,5-cyclohexadienone (TABCO), N-Bromosuccinimide (NBS) and Bromine as Efficient Catalysts for Dithioacetalization and Oxathioacetalization of Carbonyl Compounds and Transdithioacetalization Reactions
作者:Nasser Iranpoor、Habib Firouzabadi、Hamid Reza Shaterian、M. A. Zolfigol
DOI:10.1080/10426500211712
日期:2002.5.1
6-tetrabromo-2,5-cyclohexadienone (TABCO), N-bromosuccinimide (NBS), and bromine as efficient catalysts for conversion of carbonyl compounds to their cyclic and acyclic dithioacetals and 1,3-oxathiolanes under mild reaction conditions are described. These catalysts are also used for efficient transdithioacetalization of acetals, diacetals, ketals, acylals, enamines, hydrazones, and oximes with high
Blue LED-Promoted Oxathiacetalization of Aldehydes and Ketones
作者:You-Chen Liu、Daggula Mallikarjuna Reddy、Xin-An Chen、Yi-Chen Shieh、Chin-Fa Lee
DOI:10.1002/ejoc.202000218
日期:2020.5.10
A visible‐light‐promoted oxathiacetalization of aldehydes and ketones with 2‐mercaptoethanol and 3‐mercaptopropan‐1‐ol in the presence of eosin Y as catalyst is described leading to the formation of 1,3‐oxathiolanes and 1,3‐oxathianes at ambient temperature and under metal‐free conditions. The solvent is playing vital role in the protection of carbonyl compounds with mercaptoalcohol.
A mild and efficient method for the oxidative deprotection of 1,3-oxathiolanes with Fe(NO3)(3)center dot 9H(2)O and Cu(NO3)(2)center dot 3H(2)O in the absence of solvent is reported. (C) 2010 Farhad Shirini. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Jin, Tong-Shou; Zhao, Rui-Qiao; Ma, Yan-Ran, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2006, vol. 45, # 2, p. 503 - 505