JCGGDB TOP Glycan Syntheses

Reaction

JCGG ID
JCGG-RAC0001274
Submitter
The Noguchi Institute
Reaction ID
R-0000-001274
Regist Date
2012/06/21 16:48:21
REACTANT
MOLECULE ID
JCGG-COM0001429 (Reaction Tree)
Reactant Type
glycal (in Ac2O)
Mol
0.81 mmol
MOLECULE ID
JCGG-COM0001374
Reactant Type
HNO3 (in Ac2O)
Mol
3.82 equiv.
MOLECULE ID
JCGG-COM0000047
Reactant Type
TEA (in CH2Cl2)
Mol
1.21 equiv.
PRODUCT
MOLECULE ID
JCGG-COM0001430 (Reaction Tree)
Yield
85%
REACTION DETAIL
Reaction Time
10 to 15 minutes + 1 hour, 25 minutes
Reaction Temp
-30 degree C, room temp
Solvent
Ac2O, CH2Cl2
Comment
1) glycal+HNO3, 2) +TEA
Before the reaction, concentrated HNO3 was added dropwise to Ac2O at 10 degree in Celsius under constant stirring.
The glycal was added over a period of 10 to 15 minutes.
The reactants were mixed at 0 degree in Celsius, and allowed to warm slowly to room temperature within the reaction time. (second phase)
COMMENT
Keywords: galactal derivatives, 6-O-TIPS protection, trichloroacetimidates, Michael-type addition, 2-nitroglycals
There are multiple phases in this reaction.
REFERENCE
Reference Id
REF-0000-000063
Issn
Print
Doi
10.1021/jo061670b
PubMed ID
17503844
Journal Name
The Journal of organic chemistry. (2007) 72 (12): 4367-77.
Article Title
Glycal glycosylation and 2-nitroglycal concatenation, a powerful combination for mucin core structure synthesis.
Author
Jürgen, Geiger; B Gopal, Reddy; Gottfried A, Winterfeld; R, Weber; M, Przybylski; R R, Schmidt
Affiliation
Fachbereich Chemie, Universität Konstanz, Fach M 725, D - 78457 Konstanz, Germany.
Reference Id
REF-0000-000064
Source
J. Org. Chem. 2007, 72, 4367-4377
Doi
10.1021/jo061670b

©2008-2013 Research Center for Medical Glycoscience, National Institute of Advanced Industrial Science and Technology (AIST)