2,4,4,6-Tetrabromo-2,5-cyclohexadienone (TABCO) as a Versatile, Efficient, and Chemoselective Catalyst for the Acetalization and Transacetalization of Carbonyl Compounds, the Preparation of Acetonides from Epoxides and Acylals (1,1-Diacetates) from Aldehydes
The efficient and chemoselective preparation of acetals and ketals from carbonyl compounds, transacetalization reactions, the conversion of epoxides to acetonides, and the preparation of acylals from aldehydes in the presence of catalytic amounts of 2,4,4,6-tetrabromo-2,5-cyclohexadienone (TABCO) are described.
Substituent effect on the chemical behaviour of some carbonyl compounds and ketals with 1-ethoxy-3-trimethylsilylprop-1-yne
作者:D. Zakarya、A. Rayadh、M. Samih、T. Lakhlifi
DOI:10.1016/0040-4039(94)85065-8
日期:1994.1
In this work, principal component analysis (PCA) was carried out on the basis of property descriptors for a set of carbonyl compounds and ketals. A principal component projection of the points representing the compounds showed that the chemical behaviour of the compounds with 1-ethoxy-3-trimethylsilylprop-1-yne is related to their chemical composition. The obtained structure-chemical behaviour information
Zirconium Tetrachloride (ZrCl<sub>4</sub>) Catalyzed Highly Chemoselective and Efficient Transthioacetalization of Acetals
作者:Habib Firouzabadi、Nasser Iranpoor、Babak Karimi
DOI:10.1055/s-1999-2609
日期:1999.3
Zirconium tetrachloride (ZrCl4) is an efficient catalyst for the highly chemoselective transthioacetalization of acetals under mild reaction conditions.