A New Protocol for the In Situ Generation of Aromatic, Heteroaromatic, and Unsaturated Diazo Compounds and Its Application in Catalytic and Asymmetric Epoxidation of Carbonyl Compounds. Extensive Studies To Map Out Scope and Limitations, and Rationalization of Diastereo- and Enantioselectivities
作者:Varinder K. Aggarwal、Emma Alonso、Imhyuck Bae、George Hynd、Kevin M. Lydon、Matthew J. Palmer、Mamta Patel、Marina Porcelloni、Jeffery Richardson、Rachel A. Stenson、John R. Studley、Jean-Luc Vasse、Caroline L. Winn
DOI:10.1021/ja034606+
日期:2003.9.1
a general process for the in situ generation of diazo compounds from tosylhydrazone sodium salts has been established and applied in sulfur-ylide mediated epoxidation reactions. The chiral, camphor-derived, [2.2.1] bicyclic sulfide 7 was employed (at 5-20 mol % loading) to render the above processes asymmetric with a range of carbonyl compounds and tosylhydrazone sodium salts. Benzaldehyde tosylhydrazone
METHOD FOR PREPARING 2-MORPHOLINOISOBORNANE- 10-THIOL AND INTERMEDIATES FORMED THEREIN
申请人:UANG Biin-Jiun
公开号:US20110269955A1
公开(公告)日:2011-11-03
A method for preparing 2-morpholinoisobornane-10-thiol is disclosed, which has simplified steps and avoids the use of Na metal. Accordingly, it is advantageous to apply the method in a mass production.
The present invention provides an organocatalyst of formula (I),
wherein R
1
is —H, —OH, —O—Si(R
4
)(R
5
)(R
6
) or C
1-6
alkoxy, in which R
4
, R
5
and R
6
are identical or different and independently selected from the group consisting of C
1-6
alkyl, phenyl and phenyl substituted with C
1-6
alkyl; R
2
is —OH or ═O; X
1
is one selected from the group consisting of —NH—, —S— and
X
2
is one selected from the group consisting of —C(═O)—, —CH
2
— and
and X
1
is different from X
2
. The high yield and enantioselectivity of an addition reaction are obtained by using the organocatalyst of the present invention.
[EN] IMPROVED PROCESS FOR PREPARATION OF CLOPIODOGREL BISULFATE CRYSTALLINE FORM-1<br/>[FR] PROCEDE AMELIORE DE PREPARATION DE LA FORME CRISTALLINE 1 DU BISULFATE DE CLOPIDROGEL
申请人:PHARMAZELL GMBH
公开号:WO2011055378A1
公开(公告)日:2011-05-12
An improved process for preparing crystalline form-1 of (S)-methyl 2-(2-chlorophenyl)-2-6, 7-dihydrothieno[3, 2-c] pyridine-5(4H)-yl}acetate bisulfate (clopidogrel bisulfate) of formula I is provided The preparation comprises the straight conversion of an uncyclized material of (S)-methyl 2-[2- (thiophen-2-yl)ethylamino]-2-(2-chlorophenyl)acetate hydrochloride into clopidogrel bisulfate crystalline form-1 without any degradation of clopidogrel base
PHOTOSENSITIVE COMPOSITION, COMPOUND FOR USE IN THE PHOTOSENSITIVE COMPOSITION, AND PATTERN-FORMING METHOD USING THE PHOTOSENSITIVE COMPOSITION
申请人:Kawanishi Yasutomo
公开号:US20080081288A1
公开(公告)日:2008-04-03
A photosensitive composition includes (A) a compound represented by the following formula (I):
wherein R
1
to R
13
each independently represents a hydrogen atom or a substituent, Z represents a single bond or a divalent linking group, and X
−
represents an anion containing a proton acceptor functional group.