Synthesis of substituted indoles via a highly selective 7-lithiation of 4,7-dibromoindoles and the effect of indole-nitrogen on regioselectivity
摘要:
We have developed an efficient synthetic pathway to rapidly access 4-bromoindoles, 4-substituted indoles, 4-bromo-7-substituted indoles, and 4,7-disubstituted indoles using a highly selective lithiation at the 7-position of 1-alkyl-4,7-dibromoindoles when treated with t-BuLi in ether. Based upon the selectivity obtained with 5,7-dibromoindoles in our previous study and with 4,7-dibromoindoles in the current study, we conclude that the alkylated indole nitrogen plays an important role in controlling selectivity. (C) 2003 Elsevier Ltd. All rights reserved.
NOVEL INDOLE OR INDAZOLE DERIVATIVE OR SALT THEREOF
申请人:Kitade Makoto
公开号:US20130289072A1
公开(公告)日:2013-10-31
The present invention relates to provision of a novel indazole compound which is capable of inhibiting HSP90 and shows a cytostatic effect on cancer cells. The present invention also relates to provision of a drug useful for preventing and/or treating, on the basis of an HSP90 inhibitory effect, a disease in which HSP90 participates, in particular, cancer. A compound represented by the general formula (I) or a salt thereof:
wherein
X represents CH or N;
any one or two of Y
1
, Y
2
, Y
3
, and Y
4
represent C—R
3
or N, and the others represent CH;
A and B are the same or different and represent an optionally substituted monocyclic unsaturated heterocyclic group having 1 to 4 heteroatoms selected from N, S, and O;
R
1
represents a hydrogen atom, an optionally substituted alkyl group having 1 to 6 carbon atoms etc.;
R
2
represents a hydrogen atom, a halogen atom etc.;
R
3
represents a hydrogen atom, a halogen atom etc.;
R
4
and R
5
are the same or different and represent a hydroxyl group etc.;
R
6
and R
7
are the same or different and represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms etc.; and
R
8
represents an optionally substituted cycloalkyl group having 3 to 7 carbon atoms etc.
Cu-Catalyzed Amination of Base-Sensitive Aryl Bromides and the Chemoselective N- and O-Arylation of Amino Alcohols
作者:Michael J. Strauss、Kaylee X. Liu、Megan E. Greaves、Jakob C. Dahl、Seoung-Tae Kim、Yong-Jin Wu、Michael A. Schmidt、Paul M. Scola、Stephen L. Buchwald
DOI:10.1021/jacs.4c05246
日期:2024.7.10
these reactions completely and exclusively promotedC–N coupling regardless of the structure of the amino alcohol. The ability to invert the observed chemoselectivity is distinct from previously described methods that require protecting group manipulations or rely entirely on steric effects to control reactivity. These results substantially improve the scope of Cu-catalyzed C–N coupling reactions using