Chemoselective O-tert-butoxycarbonylation of hydroxy compounds using NaLaTiO4 as a heterogeneous and reusable catalyst
作者:Savita J. Singh、Radha V. Jayaram
DOI:10.1016/j.tetlet.2008.04.149
日期:2008.6
A facile, efficient and chemoselective protocol for O-tert-butoxycarbonylation of various hydroxycompounds has been developed using NaLaTiO4 (layered perovskite) as a novel catalyst. The catalyst showed remarkable activity and reusability affording high yields of the desired products under mild reaction conditions.
Mixed metal MgO-ZrO2 nanoparticle-catalyzed O-tert-Boc protection of alcohols and phenols under solvent-free conditions
作者:Manoj B. Gawande、Sharad N. Shelke、Paula S. Branco、Anuj Rathi、Rajesh K. Pandey
DOI:10.1002/aoc.2846
日期:2012.8
method for O‐tert‐Boc protection of alcohols and phenols catalyzed by MgO–ZrO2 nanoparticles under solvent‐free conditions is described. A variety of phenols, alcohols (aliphatic and aromatic) were converted to corresponding O‐tert‐Boc products in good to excellent yield (50–95%). The present protocol is expedient, simple, and efficient under solvent‐free conditions. The MgO–ZrO2 Nps are easily prepared
BIPYRIDINE COMPOUND, TRANSITION METAL COMPLEX, AND METHOD FOR PRODUCTION OF CONJUGATED AROMATIC COMPOUND USING THE TRANSITION METAL COMPLEX
申请人:Asaumi Taku
公开号:US20100184978A1
公开(公告)日:2010-07-22
A bipyridine compound represented by the formula (1):
wherein R
1
, R
2
and R
3
each independently represent a C1-C10 alkyl group which may be substituted etc., and R
4
, R
5
, R
6
, R
7
and R
8
each independently represent a hydrogen atom etc., a transition metal complex obtained by contacting a bipyridine compound represented by the formula (1) with a compound of a transition metal belonging to Group 9, 10 or 11, and a method for production of a conjugated aromatic compound comprising reacting an aromatic compound (A) wherein one or two leaving groups are bonded to an aromatic ring with an aromatic compound (A) having the same structure as that of the above-mentioned aromatic compound (A) or an aromatic compound (B) being structurally different from the above-mentioned aromatic compound (A) and having one or two leaving groups bonded to an aromatic ring, in the presence of the transition metal complex.
TRANSITION METAL COMPLEX AND PROCESS FOR PRODUCING CONJUGATED AROMATIC COMPOUND USING THE TRANSITION METAL COMPLEX
申请人:Asaumi Taku
公开号:US20110046336A1
公开(公告)日:2011-02-24
A transition metal complex obtained by contacting a bipyridine compound represented by the formula (1):
wherein R
1
, R
2
and R
3
represent a C1-C10 alkyl group which may be substituted, etc., and R
4
and R
5
represent a hydrogen atom etc., with a compound of a transition metal belonging to Group 9, 10 or 11, and a process for producing a conjugated aromatic compound comprising reacting an aromatic compound (A) wherein one or two leaving groups are bonded to an aromatic ring with an aromatic compound (A) having the same structure as that of the above-mentioned aromatic compound (A) or an aromatic compound (B) being structurally different from the above-mentioned aromatic compound (A) and having one or two leaving groups bonded to an aromatic ring, in the presence of said transition metal complex.