143771-06-6Relevant articles and documents
The synthesis of a novel benzodiazocine via an intramolecular Staudinger/aza-Wittig cyclization
O'Neil, Ian A.,Murray, Clare L.,Potter, Andrew J.,Kalindjian, S. Barret
, p. 3609 - 3610 (1997)
The novel pyrrolobenzodiazocine (1) has been prepared by an intramolecular Staudinger/aza Wittig protocol from the precursor azido aldehyde (2) in a remarkable 93% yield. Aldehyde (2) was prepared by coupling protected homoprolinol with 2-azidobenzoic aci
Synthesis of (-)-(S, S)-clemastine by invertive N → C aryl migration in a lithiated carbamate
Fournier, Anne M.,Brown, Robert A.,Farnaby, William,Miyatake-Ondozabal, Hideki,Clayden, Jonathan
supporting information; experimental part, p. 2222 - 2225 (2010/08/04)
The first enantioselective synthesis of the antihistamine agent clemastine, as its (S,S)-stereoisomer, has been achieved by ether formation between a proline-derived chloroethylpyrrolidine and an enantiomerically enriched tertiary alcohol. The tertiary alcohol was formed from the carbamate derivative of α-methyl-p-chlorobenzyl alcohol by invertive aryl migration on lithiation. The (S,S)-stereochemistry of the product confirms the invertive nature of the rearrangement.
Convenient in situ synthesis of nonracemic N-protected β-amino aldehydes from β-amino acids. Applications in Wittig reactions and heterocycle synthesis
Davies, Simon B.,McKervey, M. Anthony
, p. 1229 - 1232 (2007/10/03)
N-Z-γ-amino alcohols derived from nonracemic β-amino acids are smoothly oxidised by manganese dioxide in acetonitrile to afford aldehydes which can be trapped in situ in Wittig reactions with carbonyl-substituted phosphoranes. The application of this methodology to the synthesis of the alkaloids (S)-(+)-N-BOC-coniine, (S)-(-)-coniceine and a pipecoline precursor is described.