Pr(OTf)<sub>3</sub> as an Efficient and Recyclable Catalyst for Chemoselective Thioacetalization of Aldehydes
作者:Surya De
DOI:10.1055/s-2004-834858
日期:——
Praseodymium triflate has been found to be an efficient and recyclable catalyst for chemoselective protection of aldehydes.
三氟甲磺酸镨已被发现是一种高效且可循环的催化剂,适用于醛的选择性保护反应。
Unusually facile oxathioacetal transfer reaction: an efficient, highly selective catalytic deprotection protocol
作者:T. Ravindranathan、Subhash P. Chavan、Jos P. Varghese、Shubhada W. Dantale、Rajkumar B. Tejwani
DOI:10.1039/c39940001937
日期:——
CF3SO3SiMe3-catalysed one-to-one exchange of oxathioacetals to carbonyl compounds in the presence of 4-nitrobenzaldehyde is performed efficiently at room temperature, the protocol developed provided selective and effective deprotection of oxathiolanes in the presence of thioacetals.
Iron(III) Fluoride: A Highly Efficient and Versatile Catalyst for the Protection of Carbonyl Compounds under Solvent-Free Conditions
作者:Babasaheb P. Bandgar、Vinod T. Kamble、Ashwini Kulkarni
DOI:10.1071/ch05067
日期:——
Carbonylcompounds are successfully converted into oxathioacetals and dithioacetals with 2-mercaptoethanol and ethane-1,2-dithiol using a catalytic amount of iron(iii) fluoride under solvent-free conditions. The catalysts were recovered and reused in various runs without affecting the efficiency of the process.
A mild and efficient method for the protection of carbonyl compounds as oxathiolanes, dithiolanes and dithianes catalyzed by molybdenyl acetylacetonate
作者:Kalyan Kumar Rana、Chandrani Guin、Samaresh Jana、Subhas Chandra Roy
DOI:10.1016/j.tetlet.2003.09.146
日期:2003.11
Carbonylcompounds have been successfully converted into their corresponding oxathiolane, dithiolane and dithiane derivatives in excellent yields with 2-mercaptoethanol, 1,2-ethanedithiol and 1,3-propanedithiol using a catalytic amount of molybdenyl acetylacetonate.
CERIC AMMONIUM NITRATE AS A CONVENIENT CATALYST FOR PROTECTION OF CARBONYL COMPOUNDS AS 1,3-OXATHIANES
作者:Gourhari Maiti、Subhas Chandra Roy
DOI:10.1081/scc-120005996
日期:2002.1
method for the protection of carbonyl compounds as 1,3-oxathianes has been established by the catalytic use of ceric ammonium nitrate at ambient temperature. While different types of aryl and alkylketones and aldehydes were protected smoothly, cyclic aryl ketones and diaryl ketones remained unaffected under the reaction conditions.