A new diorganozinc-based enantioselective access to truncated d-ribo-phytosphingosine
摘要:
The use of a trans alpha,beta-epoxyaldehyde as a precursor Of D-ribo-phytosphingosines was studied. The highly stereoselective alkylation of the aldehyde with a diorganozinc reagent was ensured through double asymmetric induction. The regioselective opening of the epoxide in turn gives access to an azide from which a C-10 phytosphingosine can be easily prepared. (C) 2002 Elsevier Science Ltd. All rights reserved.
A new diorganozinc-based enantioselective access to truncated d-ribo-phytosphingosine
摘要:
The use of a trans alpha,beta-epoxyaldehyde as a precursor Of D-ribo-phytosphingosines was studied. The highly stereoselective alkylation of the aldehyde with a diorganozinc reagent was ensured through double asymmetric induction. The regioselective opening of the epoxide in turn gives access to an azide from which a C-10 phytosphingosine can be easily prepared. (C) 2002 Elsevier Science Ltd. All rights reserved.
Glycolipid derivatives, process for production of the same, intermediates for synthesis thereof, and process for production of the intermediates
申请人:Japan as represented by President of National
Center of Neurology and Psychiatry Ministry of
Health
公开号:EP2343306A1
公开(公告)日:2011-07-13
Novel glycolipid derivatives, where the substituent of the sphingosine base part is a short carbon chain alkyl group, substituted or unsubstituted cycloalkyl group, substituted or unsubstituted aryl group or substituted or unsubstituted aralkyl group and efficient synthetic methods for practical mass production of the same and intermediates useful for the synthesis of these compounds.
Glycolipids having the formula (I):
where R3 indicates a substituted or unsubstituted C1 to C7 linear alkyl group, substituted or unsubstituted cycloalkyl group, substituted or unsubstituted aryl group, or substituted or unsubstituted aralkyl group and R8 indicates a substituted or unsubstituted C1 to C35 alkyl group, substituted or unsubstituted aryl group or substituted or unsubstituted aralkyl group are chemically synthesized.
A series of truncated analogs of alpha-galactosylceramide with altered ceramide moiety was prepared, and evaluated for Th2-biased response in the context of IL-4/IFN-gamma ratio. Phytosphingosine-modified analogs including cyclic, aromatic and ethereal compounds as well as the C-glycoside analog of OCH (2) with their cytokine inducing profile are disclosed. (C) 2012 Elsevier Ltd. All rights reserved.
NEW GLYCOLIPIDS AND SYNTHETIC METHOD THEREOF AS WELL AS THEIR SYNTHETIC INTERMEDIATES, AND SYNTHETIC METHOD THEREOF
申请人:ANNOURA Hirokazu
公开号:US20100210828A1
公开(公告)日:2010-08-19
Novel glycolipid derivatives, where the substituent of the sphingosine base part is a short carbon chain alkyl group, substituted or unsubstituted cycloalkyl group, substituted or unsubstituted aryl group or substituted or unsubstituted aralkyl group and efficient synthetic methods for practical mass production of the same and intermediates useful for the synthesis of these compounds.
Glycolipids having the formula (I):
where R
3
indicates a substituted or unsubstituted C
1
to C
7
linear alkyl group, substituted or unsubstituted cycloalkyl group, substituted or unsubstituted aryl group, or substituted or unsubstituted aralkyl group and R
8
indicates a substituted or unsubstituted C
1
to C
35
alkyl group, substituted or unsubstituted aryl group or substituted or unsubstituted aralkyl group are chemically synthesized.
US8034908B2
申请人:——
公开号:US8034908B2
公开(公告)日:2011-10-11
A new diorganozinc-based enantioselective access to truncated d-ribo-phytosphingosine
The use of a trans alpha,beta-epoxyaldehyde as a precursor Of D-ribo-phytosphingosines was studied. The highly stereoselective alkylation of the aldehyde with a diorganozinc reagent was ensured through double asymmetric induction. The regioselective opening of the epoxide in turn gives access to an azide from which a C-10 phytosphingosine can be easily prepared. (C) 2002 Elsevier Science Ltd. All rights reserved.