[EN] AN IMPROVED PROCESS FOR PREPARATION OF LETROZOLE AND ITS INTERMEDIATES<br/>[FR] PROCÉDÉ PERFECTIONNÉ DE PRÉPARATION DU LÉTROZOLE ET SES INTERMÉDIAIRES
申请人:DABUR PHARMA LTD
公开号:WO2009069140A1
公开(公告)日:2009-06-04
The present invention relates to an improved process for preparation of the non-steroidal aromatase inhibitor drug, Letrozole of formula (I) and its intermediates, 4-[1-(1,2,4-triazolyl) methyl]-benzonitrile of formula (IV) and 4-[1-(1,2,4-triazolyl) methyl]-benzonitrile hydrochloride of formula (VII), all having a purity of ≥99%, which is simple, convenient, economical, does not use hazardous chemicals and industrially viable.
PROCESS FOR PREPARATION OF LETROZOLE AND ITS INTERMEDIATES
申请人:Shrawat Vimal Kumar
公开号:US20100234617A1
公开(公告)日:2010-09-16
The present invention relates to an improved process for preparation of the non-steroidal aromatase inhibitor drug, Letrozole of formula (I) and its intermediates, 4-[1-(1,2,4-triazolyl)methyl]-benzonitrile of formula (IV) and 4-[1-(1,2,4-triazolyl)methyl]-benzonitrile hydrochloride of formula (VII), all having a purity of ≧99%, which is simple, convenient, economical, does not use hazardous chemicals and industrially viable.
[EN] PYRROLIDINE DERIVATIVES AS CB1-RECEPTOR ANTAGONISTS<br/>[FR] DÉRIVÉS DE PYRROLIDINE SERVANT D'ANTAGONISTES DU RÉCEPTEUR CB1
申请人:TANABE SEIYAKU CO
公开号:WO2005115977A1
公开(公告)日:2005-12-08
The present invention relates to a novel pyrrolidine compound, which has a potent antagonistic activity against central cannabinoid (CB1) receptor, having the formula [I]: wherein each of R1 and R2 is (A) optionally substituted aryl (or heteroaryl) group, or (B) both of the groups combine to form a group of the formula: one of R3 and R4 is hydrogen and another is hydrogen, hydroxyl, hydroxyalkyl, etc., or both of R3 and R4 combine to form oxo group, R5 is hydrogen or alkyl, Y is single bond, oxygen atom or a group of the formula: -N(R7)-, R6 is optionally substituted hydrocarbon group or optionally substituted cyclic group, R7 is alkyl or alkyloxycarbonylalkyl, provided that R6 is not 4-amino-5-chloro- 2-methoxyphenyl group when Y is single bond and one of the R3 and R4 is hydrogen and another is hydroxymethyl, or a pharmaceutically acceptable salt thereof.
Herein, a nickel-catalyzed synthesis of an aryl nitrile via aryl exchange between an aromatic amide and a simple nitrile was developed. By using cheap, easy-to-handle, and low-toxic 4-cyanopyridine as the cyanating source, cyanation of various aromatic amides afforded an assortment of aryl nitriles including bioactive drugs and organic luminescent molecules in good yields. The reaction exhibited wide
Novel pyrrolidine compound and a process for preparing the same
申请人:Moritani Yasunori
公开号:US20070167440A1
公开(公告)日:2007-07-19
The present invention relates to a novel pyrrolidine compound, which has a potent antagonistic activity against central cannabinoid (CB1) receptor, having the formula [I]: wherein each of R
1
and R
2
is (A) optionally substituted aryl (or heteroaryl) group, or (B) both of the groups combine to form a group of the formula: one of R
3
and R
4
is hydrogen and another is hydrogen, hydroxyl, hydroxyalkyl, etc., or both of R
3
and R
4
combine to form oxo group, R
5
is hydrogen or alkyl, Y is single bond, oxygen atom or a group of the formula: —N(R
7
)—, R
6
is optionally substituted hydrocarbon group or optionally substituted cyclic group, R
7
is alkyl or alkyloxycarbonylalkyl, provided that R
6
is not 4-amino-5-chloro-2-methoxyphenyl group when Y is single bond and one of the R
3
and R
4
is hydrogen and another is hydroxymethyl, or a pharmaceutically acceptable salt thereof.