Total Synthesis of (±)‐Phyllantidine: Development and Mechanistic Evaluation of a Ring Expansion for Installation of Embedded Nitrogen‐Oxygen Bonds
作者:Kyle M. Lambert、Joshua B. Cox、Lin Liu、Amy C. Jackson、Sam Yruegas、Kenneth B. Wiberg、John L. Wood
DOI:10.1002/anie.202003829
日期:2020.6.8
The development of a concise total synthesis of (±)‐phyllantidine (1 ), a member of the securinega family of alkaloids containing an unusual oxazabicyclo[3.3.1]nonane core, is described. The synthesisemploys a unique synthetic strategy featuring the ring expansion of a substituted cyclopentanone to a cyclic hydroxamic acid as a key step that allows facile installation of the embedded nitrogen‐oxygen
Method for producing jasmonate derivatives and intermediates thereof
申请人:Kao Corporation
公开号:US20010049455A1
公开(公告)日:2001-12-06
The present invention provides a method for efficiently producing a 2-alkyl-2-cyclopentenone as well as a method for producing a jasmonate derivative by using the same. That is, in the present invention, the compound (2) is obtained by reacting an amine and a hydrogen halide with the compound (1) at a specific ratio to carry out isomerization reaction or by reacting a catalyst comprising an amine and a hydrogen halide with the compound (3) to carry out dehydration-isomerization reaction. Further, this compound (2) is reacted with a malonic acid diester and then reacted with water to obtain a jasmonate derivative (5):
1
wherein each of R
1
and R
2
represents H, a C
1-8
alkyl group or the like, and R
3
represents a C
1-3
alkyl group.
Disubstituted cycloalkanones as fragrance materials
申请人:Takasago Institute For Interdisciplinary Science Inc.
公开号:EP0967265A2
公开(公告)日:1999-12-29
Disubstituted cycloalkanones are prepared from one of 2-cyclopentylidenecyclopentan-1-one, 2-cyclohexylidenecyclohexan-1-one, 2-cyclopentylidenecyclohexan-1-one, or 2-cyclohexylidenecyclopentan-1-one. The resulting compounds were analyzed for their odor characteristics. The different compounds exhibited varied odor characteristics, which were not predictable from the structures of the compounds. The compounds are useful in the preparation of fragrance compositions and products formed from same.
COMPOUND HAVING TGF-BETA INHIBITORY ACTIVITY AND MEDICINAL COMPOSITION CONTAINING THE SAME
申请人:KIRIN BEER KABUSHIKI KAISHA
公开号:EP1548008A1
公开(公告)日:2005-06-29
The present invention provides compounds represented by formula (I) and pharmaceutically acceptable salts and solvates thereof:
wherein X represents CH or N; Z represents -O-, -NH- or - C(=O)-; R and R' represent a hydrogen atom, hydroxyl, a halogen atom, optionally substituted alkyl, optionally substituted alkenyl optionally substituted alkoxy, amino, aminocarbonyl, or an optionally substituted heterocyclic group; and A represents an optionally substituted specific carbocyclic or heterocyclic group. The compounds according to the present invention have excellent TGFβ inhibitory activity.