Cascade Metathesis Reactions for the Synthesis of Taxane and Isotaxane Derivatives
作者:Cong Ma、Aurélien Letort、Rémi Aouzal、Antonia Wilkes、Gourhari Maiti、Louis J. Farrugia、Louis Ricard、Joëlle Prunet
DOI:10.1002/chem.201600592
日期:2016.5.10
Tricyclic isotaxane and taxane derivatives have been synthesized by a very efficient cascade ring-closing dienyne metathesis (RCDEYM) reaction, which formed the A and B rings in one operation. When the alkyne is present at C13 (with no neighboring gem-dimethyl group), the RCEDYM reaction leads to 14,15-isotaxanes 16 a,b and 18 b with the gem-dimethyl group on the A ring. If the alkyne is at the C11
Pd(II)-catalyzed intramolecularaminocarbonylation of olefins bearing many types of nitrogen nucleophiles has been examined under two typical conditions: acidic conditions [conditions A, typically PdCl(2) (0.1 equiv) and CuCl(2) (3.0 equiv) under 1 atm of CO at room temperature in methanol] and buffered conditions [conditions B, typically PdCl(2) (0.1 equiv) and CuCl(2) (2.3 equiv) under 1 atm of CO at
Regioselectivity in electrochemical additions of the allyl groups in substituted allyl halides to α,β-unsaturated esters or acetone
作者:Shohei Satoh、Hiroshi Suginome、Masao Tokuda
DOI:10.1016/s0040-4039(01)90471-x
日期:1981.1
Electrochemical additions of the allyl groups in substituted allyl halides to some α,β-unsaturated esters took place in a regioselective manner at either of their α-or γ-carbon terminus, whereas regioselectivity in the addition to acetone was found to be controlled by changing a cathode material or an electrolytic potential.
SATURATED-RING-FUSED DIHYDROPYRIMIDINONE OR DIHYDROTRIAZINONE COMPOUNDS AND PHARMACEUTICAL USE THEREOF
申请人:Japan Tobacco Inc.
公开号:US20190300490A1
公开(公告)日:2019-10-03
The present invention relates to saturated-ring-fused dihydropyrimidinone or dihydrotriazinone compounds, or pharmaceutically acceptable salts thereof, having RORγ antagonist activity, pharmaceutical compositions comprising the same, and pharmaceutical use thereof. A compound of Formula [I] or a pharmaceutically acceptable salt thereof, a pharmaceutical composition comprising the same, and pharmaceutical use thereof are provided:
wherein each substituent is defined as defined in the description.
Cp2TiCl2-catalyzed grignard exchange reactions with 1,3-dienes or styrenes. Preparation of allylic and α-arylethyl grignard reagents by a convenient and quantitative method
作者:Fumie Sato、Hiroaki Ishikawa、Masao Sato
DOI:10.1016/s0040-4039(01)85474-5
日期:1980.1
The addition of a catalytic amount of Cp2TiCl2 to an ether solution of propylmagnesium bromide and 1,3-dienes brings about an exchange reaction forming allylicGrignard reagents.