Ruthenium-catalyzed hydroamidations of alkynes allow a concise synthetic entry to both E- and Z-configured enamide natural products. This was demonstrated by the synthesis of botryllamides C and E, lansiumamides A and B, and lansamide I in 1-3 steps and 57-98% yield from simple, commercially available precursors.
炔烃的钌催化加氢酰胺化允许简洁的合成进入 E-和 Z-配置的烯酰胺天然产物。这通过从简单的市售前体以 1-3 个步骤合成葡萄酰胺 C 和 E、兰胺酰胺 A 和 B 以及兰酰胺 I 以及 57-98% 的产率得到了证明。
[EN] PROCESS FOR PRODUCING OPTICALLY ACTIVE 3-(4-HYDROXYPHENYL)PROPIONIC ACIDS<br/>[FR] PROCEDE DE PRODUCTION D'ACIDES 3-(4-HYDROXYPHENYL)PROPIONIQUES OPTIQUEMENT ACTIFS
申请人:TAKASAGO PERFUMERY CO LTD
公开号:WO2005051882A1
公开(公告)日:2005-06-09
The present invention relates to a process for producing an optically active 3-(4-hydroxyphenyl)propionic acid useful as intermediates for medicines, through short steps in good yield and with high optical purity. More specifically, the present invention relates to a process for producing an optically active 3-(4-hydroxyphenyl)propionic acid of the formula (6): wherein R2 is an alkyl group; R5 to R8 are each independently a hydrogen atom or a substituent; and the symbol * is an chiral carbon atom, or a salt thereof, which comprises reacting a benzaldehyde of the formula (1): wherein R1 is a protective group; and R5 to R8 are each the same as defined above, with a glycolic acid derivative of the formula (2): wherein R3 is a hydrocarbon group; and R2 is the same as defined above, hydrolyzing the resulting product to give a cinnamic acid of the formula (4): wherein R1, R2 and R5 to R8 are each the same as defined above, or a salt thereof, and subjecting the resulting cinnamic acid (4) or a salt thereof to asymmetric hydrogenation to give an optically active phenylpropionic acid of the formula (5): wherein all the symbols are each the same as defined above, or a salt thereof, followed by deprotection.
Process for producing optically active 3-(4-hydroxyphenyl)proprionic acids
申请人:Yokozawa Tohru
公开号:US20070142472A1
公开(公告)日:2007-06-21
The present invention relates to a process for producing an optically active 3-(4-hydroxyphenyl)propionic acid useful as intermediates for medicines, through short steps in good yield and with high optical purity. More specifically, the present invention relates to a process for producing an optically active 3-(4-hydroxyphenyl)propionic acid of the formula (6): wherein R
2
is an alkyl group; R
5
to R
8
are each independently a hydrogen atom or a substituent; and the symbol * is an chiral carbon atom, or a salt thereof, which comprises reacting a benzaldehyde of the formula (1): wherein R
1
is a protective group; and R
5
to R
8
are each the same as defined above, with a glycolic acid derivative of the formula (2): wherein R
3
is a hydrocarbon group; and R
2
is the same as defined above, hydrolyzing the resulting product to give a cinnamic acid of the formula (4): wherein R
1
, R
2
and R
5
to R
8
are each the same as defined above, or a salt thereof, and subjecting the resulting cinnamic acid (4) or a salt thereof to asymmetric hydrogenation to give an optically active phenylpropionic acid of the formula (5): wherein all the symbols are each the same as defined above, or a salt thereof, followed by deprotection.
PROCESS FOR PRODUCING OPTICALLY ACTIVE 3-(4-HYDROXYPHENYL)PROPIONIC ACIDS
申请人:Takasago International Corporation
公开号:EP1687250A1
公开(公告)日:2006-08-09
Novel Peptide Chemistry in Terrestrial Animals: Natural Luciferin Analogues from the Bioluminescent Earthworm<i>Fridericia heliota</i>
作者:Maxim A. Dubinnyi、Aleksandra S. Tsarkova、Valentin N. Petushkov、Zinaida M Kaskova、Natalja S. Rodionova、Sergey I. Kovalchuk、Rustam H. Ziganshin、Mikhail S. Baranov、Konstantin S. Mineev、Ilia V. Yampolsky
DOI:10.1002/chem.201406498
日期:2015.3.2
AsLn12: novelluciferin analogs from the bioluminescent earthworm Fridericia heliota. They were found to be highly unusual modified peptides, comprising either of the two tyrosine‐derived chromophores, CompX or CompY and a set of amino acids, including threonine, gamma‐aminobutyric acid, homoarginine, and unsymmetrical N,N‐dimethylarginine. These natural compounds represent a unique peptide chemistry