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IJC-B Vol.50B(04) [April 2011] >


Title: Toward a stereoselective synthesis of tetrahydroxy long chain base (LCB) and the synthesis of analogs of mannostatin A
Authors: Raghavan, Sadagopan
Rathore, Kailash
Sridhar, B
Keywords: Tetrahydroxy long chain base (LCB)
Mannostatin A
Sulfoxide
Sulfinylimine
Pummerer reaction
Issue Date: Apr-2011
Publisher: NISCAIR-CSIR, India
Abstract: Efforts toward the stereoselective synthesis of tetrahydroxy long chain base and analogs of mannostatin A are described. The sulfinyl moiety has been efficiently utilized as an intramolecular nucleophile for oxidative functionalization of an alkene and regioselective opening of an epoxide. Nucleophilic addition to sulfinylimine has been used for the introduction of amino stereogenic center. Pummerer reaction has not been successful with a free N-H group at -carbon. Pummerer reaction on a N,O-acetonide furnishes an aldehyde. Attempted Wittig olefination to access the protected derivative of long chain base have failed. The analog of mannostatin could not be prepared by intramolecular addition of a sulfinyl carbanion to an imine but could be prepared by radical chemistry.
Page(s): 559-579
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0983(Online); 0376-4699(Print)
Source:IJC-B Vol.50B(04) [April 2011]

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