Catalytic Diastereoselective Polycyclization of Homo(polyprenyl)arene Analogues Bearing Terminal Siloxyvinyl Groups
摘要:
Highly diastereoselective polycyclization of homo(polyprenyl) arene analogues bearing terminal siloxyvinyl groups was catalyzed by tin(IV) chloride (10 mol %). The cyclizations of tert-butyldiphenylsilyl and triisopropylsilyl polyenol ethers gave 4 alpha(equatorial)- and 4 beta(axial)-siloxypolycycles as major isomers, respectively. The strong nucleophilicity of pro-C(9), a (6E) geometry, and a bulky silyl group effectively favored the 4 alpha-preference, whereas the weak nucleophilicity of pro-C(9), a (6Z)-geometry, and less steric hindrance of a silyl group favored the 4 beta-preference.
New substituted heterocyclic compounds, compositions containing them, and methods of using them for the inhibition of Raf kinase activity are provided. The new compounds and compositions may be used either alone or in combination with at least one additional agent for the treatment of a Raf kinase mediated disorder, such as cancer.
COMPOUNDS FOR CANCER CHEMOTHERAPEUTIC SENSITIZATION
申请人:Regents of the University of Minnesota
公开号:US20190240244A1
公开(公告)日:2019-08-08
The invention provides a compound of formula (I), (II) or (III):
wherein R
1
, R
2
, R
3
, R
4
and R
5
have any of the values described in the specification, as well as compositions comprising a compound of formula (I), (II) or (III). The compounds and compositions are useful as chemotherapeutic sensitizing agents.
[EN] 3-((HETERO-)ARYL)-8-AMINO-2-OXO-1,3-DIAZA-SPIRO-[4.5]-DECANE DERIVATIVES<br/>[FR] DÉRIVÉS DE 3-((HÉTÉRO-)ARYL)-8-AMINO-2-OXO-1,3-DIAZA-SPIRO-[4.5]-DÉCANE
申请人:GRUENENTHAL GMBH
公开号:WO2017121647A1
公开(公告)日:2017-07-20
The invention relates to 3-((hetero-)aryl)-8-amino-2-oxo-1,3-diaza-spiro-[4.5]-decane derivatives, their preparation and their use in medicine, particularly in the treatment of pain.
USE OF SUBSTITUTED ISOQUINOLINONES, ISOQUINOLINDIONES, ISOQUINOLINTRIONES AND DIHYDROISOQUINOLINONES OR IN EACH CASE SALTS THEREOF AS ACTIVE AGENTS AGAINST ABIOTIC STRESS IN PLANTS
申请人:Frackenpohl Jens
公开号:US20140302987A1
公开(公告)日:2014-10-09
Use of substituted isoquinolinones, isoquinolinediones, isoquinolinetriones and dihydroisoquinolinones of the general formula (I) or their respective salts
where the radicals in the general formula (I) correspond to the definitions given in the description,
for enhancing stress tolerance in plants to abiotic stress, for strengthening plant growth and/or for increasing plant yield, and selected processes for preparing the compounds mentioned above.
Iron-Catalyzed Isopropylation of Electron-Deficient Aryl and Heteroaryl Chlorides
作者:James N. Sanderson、Andrew P. Dominey、Jonathan M. Percy
DOI:10.1002/adsc.201601097
日期:2017.3.20
of secondaryalkyl‐substituted aryl and heteroaryl chlorides challenge both selectivity and functional group tolerance. This contribution describes the use of statistical design of experiments to develop an effective procedure for the preparation of isopropyl‐substituted (hetero)arenes with minimal isopropyl to n‐propyl isomerization. The reaction tolerates electronically diverse aryl chloride coupling