Nucleophile- or Light-Induced Synthesis of 3-Substituted Phthalides from 2-Formylarylketones
摘要:
The surprisingly facile conversion (isomerization) of 2-formyl-arylketones into 3-substituted phthalides, as observed for the marine natural product pestalone and its per-O-methylated derivative, was investigated using a series of simple 2-acylbenzaldehydes as substrates. The transformation generally proceeds smoothly in DMSO, either in a Cannlzarro-Tishchenko-type reaction under nucleophile catalysis (NaCN) or under photochemical conditions (DMSO, 350 nm).
medicinal agents and bioactive alkaloids. Herein we report a broadly applicable synthesis of enantioenriched NH lactams through a one-pot asymmetric reductive amination/cyclization sequence of easily available keto acids/esters. Such cascade processes alleviate the demand for protecting group manipulations as well as intermediate purification. This strategy is capable of constructing enantioenriched lactams
[EN] CARBOSTYRIL COMPOUND<br/>[FR] DÉRIVÉ DE CARBOSTYRILE
申请人:OTSUKA PHARMA CO LTD
公开号:WO2006035954A1
公开(公告)日:2006-04-06
The present invention provides a carbostyril compound represented by General Formula (1) or a salt thereof, wherein A is a direct bond, a lower alkylene group, or a lower alkylidene group; X is an oxygen atom or a sulfur atom; R4 and R5 each represent a hydrogen atom; the bond between the 3 and 4 positions of the carbostyril skeleton is a single bond or a double bond; R1 is a hydrogen atom, etc; R2 is a hydrogen atom, etc; and R3 is a hydrogen atom, etc. The carbostyril compound or salt thereof of the present invention induces the production of TFF, and thus is usable for the treatment and/or prevention of disorders such as alimentary tract diseases, oral diseases, upper respiratory tract diseases, respiratory tract diseases, eye diseases, cancers, and wounds.
Catalytic Enantioselective Synthesis of Mariline A and Related Isoindolinones through a Biomimetic Approach
作者:Chang Min、Yingfu Lin、Daniel Seidel
DOI:10.1002/anie.201709182
日期:2017.11.27
The catalytic enantioselective synthesis of isoindolinones was achieved through the condensation of 2‐acyl‐benzaldehydes and anilines. In the presence of 1 mol % of a chiral phosphoric acid catalyst, reactions reach completion within 10 min and provide products with up to 98 % ee. Anilines with an ortho t‐butyl group form atropisomeric products, thereby enabling the simultaneous generation of axial
Phthalides by Rhodium-Catalyzed Ketone Hydroacylation
作者:Diem H. T. Phan、Byoungmoo Kim、Vy M. Dong
DOI:10.1021/ja907711a
日期:2009.11.4
phthalides by using enantioselective ketone hydroacylation. In the presence of Rh[(Duanphos)]X (X = NO(3), OTf, OMs), various 2-ketobenzaldehydes undergo intramolecularhydroacylation to produce phthalide products in good yields and 92-98% ee's. Our study highlights the key role counterions play in controlling both reactivity and enantioselectivity. A concise asymmetric total synthesis of the celery extract
Novel substituted pyrazole derivative, process for producing the same, and herbicidal composition containing the same
申请人:Hirohara Yoji
公开号:US20050014649A1
公开(公告)日:2005-01-20
Substituted pyrazole compounds of the formula (1). The compounds are synthesized from a pyrazole derivative and a haloalkyleneoxime ester derivative, and have excellent herbicidal effects. Herbicide compositions containing the substituted pyrazole derivatives or hydrazide derivatives thereof as active ingredients possess wide herbicidal spectra, work sufficiently in small dosages, and are sufficiently safe for certain important crops.