[EN] 2, 3, 6-TRISUBSTITUTED-4-PYRIMIDONE DERIVATIVES<br/>[FR] DERIVES DE 2,3,6-TRISUBSTITUE 4-PYRIMIDONE
申请人:MITSUBISHI PHARMA CORP
公开号:WO2004085408A1
公开(公告)日:2004-10-07
A pyrimidone derivative having tau protein kinase 1 inhibitory activity which is represented by formula (I) or a salt thereof, or a solvate thereof or a hydrate thereof; useful for prventive and/or therapeutic treatment of diseass such as neurodegenerative diseases (e.g. Alzheimer disease); wherein Q represents CH or nitrogen atom; R represents a C1-C12 alkyl group; the ring of Formula (I): represents piperazine ring or piperidine ring; each X independently represents a C1-C8 alkyl group, an optionally partially hydrogenated C6-C10 aryl ring, an indan ring or the like; m represents an integer of 1 to 3; each Y independently represents a halogen atom, a hydroxy group, a cyano group, a C1-C6 alkyl group or the like; n represents an integer of 0 to 8; when X and Y or two Y groups are attached on the same carbon atom, they may combine to each other to form a C2-C6 alkylene group.
Free radical annulation of dichlorocyclobutanones with sequential ring expansion
作者:Paul Dowd、Wei Zhang、Steven J. Geib
DOI:10.1016/0040-4020(95)00093-n
日期:1995.3
reaction of dichloroketene with 1,5-dienes undergo intramolecular freeradical annulation. Lewis acid-promoted ring-opening of the cyclized cyclobutanones then yields novel ringexpansion products. Reaction of (R)-carvone provides an unusual example leading to the formation of a tricyclic dione. The carbonyl group of carvone enhances the radical cyclization and influences the ring-opening pathway.
Asymmetric reduction of αβ-unsaturated ketones with lithium aluminium hydride partially decomposed by (–)-N-methylephedrine and N-ethylaniline
作者:Shiro Terashima、Norihiko Tanno、Kenji Koga
DOI:10.1039/c39800001026
日期:——
The title asymmetric reaction is found to convert open chain enones into the corresponding optically active allylic alcohols in high optical (78–98% enantiomeric excess) and chemical (92–100%) yields.
Asymmetric reduction of various types of ketones with lithium aluminum hydride partially decomposed with (-)-N-methylephedrine and N-ethylaniline.
作者:NORIHIKO TANNO、SHIRO TERASHIMA
DOI:10.1248/cpb.31.837
日期:——
The asymmetric reduction of open chain enones to the corresponding optically active allylic alcohols was achieved in higher chemical (92-100%) and optical (78-98% e.e.) yields than those for cyclic enones (58-88% chemical and 34-58% optical yields). The observed high optical yields for optically active allylic alcohols can be explained on the assumption that, unlike cyclic enones in which the double bonds are fixed in s-trans conformation, open chain enones can be reduced in their s-cis conformations. An optically active propargylic alcohol was similarly produced from an ynone in 88% chemical and 76% optical yields by means of the present asymmetric reduction. When the same asymmetric reduction was applied to simple aromatic and aliphatic ketones by using 1.8 eq of the chiral reducing agent, the corresponding optically active alcohols were obtained in 88-100% chemical and 51-90% optical yields (for aromatic ketones) and in 78-98% chemical and 0-67% optical yields (for aliphatic ketones). On the basis of the results obtained in this and the preceding paper, a possible structure of the exploited chiral reducing agent is proposed and the transition states for the asymmetric reduction are discussed.
Catalytic 1,2-dihydronaphthalene and <i>E</i>-aryl-diene synthesis <i>via</i> Co<sup>III</sup>–Carbene radical and <i>o</i>-quinodimethane intermediates
作者:Colet te Grotenhuis、Braja G. Das、Petrus F. Kuijpers、Wouter Hageman、Mees Trouwborst、Bas de Bruin
DOI:10.1039/c7sc03909c
日期:——
yields for substrates with an R2 = COOEt substituent at the vinylic position (~70-90% ). Changing the R2 moiety from an ester to other substituents has a surprisingly large influence on the (isolated) yields. This behaviour is unexpected for a radical rebound ring-closure mechanism, and points to a mechanism proceeding via ortho-quinodimethane (o-QDM) intermediates. Furthermore, substrates with an alkyl