One stone two birds: cobalt-catalyzed <i>in situ</i> generation of isocyanates and benzyl alcohols for the synthesis of <i>N</i>-aryl carbamates
作者:Sida Li、Ruhima Khan、Xia Zhang、Yong Yang、Zheting Wang、Yong Zhan、Yuze Dai、Yue-e Liu、Baomin Fan
DOI:10.1039/c9ob00924h
日期:——
synthesis of N-aryl carbamates from N-Boc-protected amines has been developed. The cobalt-catalyzed in situ generation of isocyanates from N-Boc-protected amines and benzyl alcohols from benzyl formates has been achieved for the first time, which in turn furnished the corresponding benzyl carbamates in moderate to high yields. The reaction was catalyzed by CoI2 with tris-(4-dimethylaminophenyl)-phosphine
A New Generation of <i>N</i>-Aryl-<i>N</i>‘-(1-alkyl-2-chloroethyl)ureas as Microtubule Disrupters: Synthesis, Antiproliferative Activity, and β-Tubulin Alkylation Kinetics
New N-aryl-N'-2-chloroethylureas (CEUs) with enhanced cytotoxicity were developed as antimitotic agents potentially useful in cancer chemotherapy. Highly potent CEUs were obtained by introduction of a branched alkylating chain, the N'-(1-methyl-2-chloro)ethyl group. Their cytotoxic activity was enantio-dependent and induced through specific alkylation of beta-tubulin, leading to microtubule disruption
Palladium-catalyzed intermolecular C–N bond-forming reactions between arylhalides and amides are described using 2-dialkylphosphino-2′-alkoxyl-1,1′-binaphthyl, which is both bulky and electron-rich, as the ligand. A variety of amides, including aliphatic and aromatic primary amides, lactams, and carbamates, were viable substrates for the amidation, which exhibited good functional group compatibility
Ag+ mediated deaminations of N-Boc aryl hydrazines for the efficient synthesis of N-Boc aryl amines
作者:Kang-Sang Lee、Young-Kwan Lim、Cheon-Gyu Cho
DOI:10.1016/s0040-4039(02)01800-2
日期:2002.10
N-Boc-aryl hydrazines were converted into N-Boc-aryl amines under the action of Ag+. Its mild reaction conditions tolerate the presence of a variety of functional groups.
A compound of formula (I) or its enantiomers or diastereoisomers thereof:
wherein: A, X, W, R
1
, Y; R
3
; and R
4
are as defined herein.
The compounds of the invention may be used as inhibitors of the papilloma virus E1-E2-DNA complex. The invention further provides a method of treating or preventing human papilloma virus infection.