The present invention relates to compounds that have ultraviolet light absorbing properties, and which can also have mesogenic properties. The present invention also relates to compositions that include one or more such compounds, and to articles of manufacture that include one or more such compounds, such as optical elements that include an optical substrate and a layer that includes at least one compound of the present invention.
N,N-disubstituted lithium bis(carbamoyl)cuprate. A convenient complex for one-pot conversions of amines to formamides, oxamides, carbamates, and oxamic acids
作者:Yoshiaki Wakita、Shun-Ya Noma、Minoru Maeda、Masaharu Kojima
DOI:10.1016/0022-328x(85)80441-1
日期:1985.12
Lithiumbis(carbamoyl)cuprates (2) were readily derived from secondary amines such as N-methylaniline, N-methylbenzylamine, and diethylamine, under mild carbonylation conditions (0°C, 1 atm of carbon monoxide), but diphenylamine and benzylphenylamine were unsuitable as the starting materials. The carbamoylcopper complexes 2 formed in ether were readily converted to the corresponding formamides, oxamides
Facile synthesis of carbamoylated benzimidazo[2,1-<i>a</i>]isoquinolin-6(5<i>H</i>)-ones <i>via</i> radical cascade cyclization under metal-free conditions
作者:Qi Liu、Lei Wang、Jie Liu、Shuchen Ruan、Pinhua Li
DOI:10.1039/d1ob00101a
日期:——
An efficient synthesis of carbamoylated benzimidazo[2,1-a]isoquinolin-6(5H)-ones from 2-arylbenzoimidazoles and oxamic acids was developed under metal-free conditions with good product yields.
(NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub> promoted tandem radical cyclization of quinazolin-4(3<i>H</i>)-ones with oxamic acids for the construction of fused quinazolinones under metal-free conditions
作者:Shenyuan Gao、Menglu Cai、Gang Xu、Qiaolin Jin、Xiaozhong Wang、Linze Xu、Lixiang Wang、Liyan Dai
DOI:10.1039/d3ob02081a
日期:——
A novel cascade radical addition/cyclization reaction of non-activated olefins and oxamic acids has been proposed. Under transition metal-free conditions, 36 quinazolinone derivatives containing an amide moiety were successfully synthesized, with the highest yield being 81%. This method involves the preparation of aminoacyl fused quinazolinone derivatives under mild conditions, offering advantages
A process for the preparation of isocyanates and/or derivatives thereof
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0067463A1
公开(公告)日:1982-12-22
Compounds having at least one group -N=C=O and/or
wherein A represents a group OB or NR'R2 wherein B represents an alkyl or aryl group which may contain halogen, alkyl or alkoxy groups and R' and R2 which may be the same or different each represent H, or alkyl or aryl groups which may contain substituents, can be prepared by oxidative conversion of compounds having at least one group
wherein X represents OY or
wherein Y is H, a metal ion or a group NR3R4R5R6 wherein each of R3, R4, R5 and R6 which may be the same or different, is H, alkyl or (substituted) (alk)aryl and Z is a (substituted) alkyl or aryl group.
具有至少一个基团-N=C=O 和/或
其中 A 代表基团 OB 或 NR'R2,其中 B 代表可含有卤素、烷基或烷氧基的烷基或芳基,R'和 R2 可相同或不同,各自代表 H 或可含有取代基的烷基或芳基。
其中 X 代表 OY 或
其中 Y 是 H、金属离子或基团 NR3R4R5R6,其中 R3、R4、R5 和 R6(可以相同或不同)各自是 H、烷基或(取代的)(烷基)芳基,Z 是(取代的)烷基或芳基。