The invention relates to substituted oxopyridine derivatives and to processes for preparation thereof, and also to the use thereof for production of medicaments for treatment and/or prophylaxis of diseases, especially of cardiovascular disorders, preferably thrombotic or thromboembolic disorders, and oedemas, and also ophthalmic disorders.
The novel and efficient direct synthesis of N,O-acetal compounds using a hypervalent iodine(iii) reagent: an improved synthetic method for a key intermediate of discorhabdins
作者:Yu Harayama、Masako Yoshida、Daigo Kamimura、Yasuyuki Kita
DOI:10.1039/b418212j
日期:——
The use of hypervalent iodine(III) reagents allowed us to develop the novel and efficient direct synthesis of N,O-acetal compounds via the oxidative fragmentation reaction of alpha-amino acids or alpha-amino alcohols; furthermore, we succeeded in developing an improved synthesis of the key intermediate of discorhabdins.
The Efficient Direct Synthesis of N,O-Acetal Compounds as Key Intermediates of Discorhabdin A: Oxidative Fragmentation Reaction of α-Amino Acids or β-Amino Alcohols by Using Hypervalent Iodine(III) Reagents
作者:Yu Harayama、Masako Yoshida、Daigo Kamimura、Yasufumi Wada、Yasuyuki Kita
DOI:10.1002/chem.200501635
日期:2006.6.14
Hypervalent iodine(III) reagents are readily available, easy to handle, and have a low toxicity and similar reactivities to those of heavy metal reagents, and hence they are used for various oxidative reactions. The oxidative cleavage of alkynes or carbonyl compounds by using bis(trifluoroacetoxy)iodo(III) pentafluorobenzene (C(6)F(5)I(OCOCF(3))(2)) has been reported. Herein, the efficient direct synthesis
The invention relates to substituted oxopyridine derivatives of formula (I) and to processes for preparation thereof, and also to the use thereof for production of medicaments for treatment and/or prophylaxis of diseases, especially of cardiovascular disorders, preferably thrombotic or thromboembolic disorders, and oedemas, and also ophthalmic disorders.
作者:Csaba Somlai、Sándor Lovas、Péter Forgó、Richard F. Murphy、Botond Penke
DOI:10.1081/scc-100107012
日期:2001.1
Tosylation of N-alpha -protected threonine methyl-and benzyl esters was investigated. Depending on the protecting groups, the composition of the reaction mixtures showed different ratio between O-tosyl-and dehydrothreonine derivatives. The latter was formed exclusively in case of N-alpha -Fmoc-threonine benzyl ester.