BF3·OEt2-promoted reaction of isocyanides with o-aminobenzophenones
摘要:
Aliphatic isocyanides react with o-aminobenzophenones in dichloromethane under Lewis acid catalysis at ambient temperature to give, unexpectedly, 4-aryl-4-hydroxy-3,4-dihydroquinazolines in good to excellent yields. The outcome of the reaction is rationalized by a skeletal rearrangement of the initially formed 'intramolecular Passerini' reaction products, 2-amino-3-hydroxy-3-aryl-3H-indoles. (C) 2009 Elsevier Ltd. All rights reserved.
One-Step Assembly of Carbamoyl-Substituted Heteroannelated [1,4]Thiazepines
作者:Alexey P. Ilyn、Marina V. Loseva、Vladimir Y. Vvedensky、Elena B. Putsykina、Sergey E. Tkachenko、Dmitri V. Kravchenko、Alexandr V. Khvat、Mikhail Y. Krasavin、Alexandre V. Ivachtchenko
DOI:10.1021/jo052640w
日期:2006.3.31
We present a convenient synthesis of novel heteroaryl-fused 3-oxo-1,4-thiazepine-5-carboxamides and 5-oxo-1,4-thiazepine-3-carboxamides using a modification of four-component Ugi condensation. We demonstrate the usefulness and versatility of the developed approach for the synthesis of variously substituted compounds and discuss the scope and limitations of the chemistry involved.
Diversity-oriented pyrazol-3-one synthesis based on hydrazinodipeptide-like units prepared via the Ugi reaction
作者:Ekaterina Lakontseva、Mikhail Krasavin
DOI:10.1016/j.tetlet.2010.05.133
日期:2010.8
N-Cyanoacetyl-N′-trifluoroacetyl-N′-alkylhydrazines, prepared via hydrazino-Ugi reaction, provided different pyrazol-3-ones when exposed to mildly acidic and mildly basic conditions at 60 °C. These approaches offer a facile access to two different pyrazol-3-one-containing chemotypes in a diversity-oriented fashion, in only two chemical operations from simple precursors.
Optical data stores containing a Co-phthalocyanine complex in the information layer recordable using light
申请人:——
公开号:US20020127366A1
公开(公告)日:2002-09-12
The present invention relates to a singly recordable optical data medium using Co-phthalocyanine complexes of the formula (I)
1
In which the groups are defined herein, as light-absorbing compounds in the information layer of optical data media, in which information layer is recordable using light, particularly for CD-R, and the application of the above-mentioned compounds to a polymer substrate, particularly polycarbonate, by spin coating.
A novel synthetic protocol toward imidazo[1,2-a]quinoxalines has been developed. It includes two isocyanide-based multicomponent reactions sequentially introducing four diversity elements to the final products.
OPTISCHE DATENSPEICHER ENTHALTEND EINEN CO-PHTHALOCYANIN-KOMPLEX IN DER MIT LICHT BESCHREIBBAREN INFORMATIONSSCHICHT