170876-73-0Relevant articles and documents
Preparation of aminoalkyl chlorohydrin hydrochlorides: Key building blocks for hydroxyethylamine-based HIV protease inhibitors
Beaulieu, Pierre L.,Wernic, Dominik
, p. 3635 - 3645 (1996)
Enantiomerically pure N,N-dibenzyl-α-amino aldehydes reacted with (chloromethyl)lithium, generated in situ from bromochloromethane and lithium metal, to give predominantly erythro aminoalkyl epoxides. Treatment of the crude epoxides with aqueous hydrochloric acid gave crystalline (2S,3S)-N,N-dibenzylamino chlorohydrin hydrochlorides in 32-56% overall yield and high isomeric purity. These compounds are versatile synthetic intermediates for the preparation of hydroxyethylamine-based HIV protease inhibitors, either directly as such, or via conversion to the corresponding N-Boc(2S,3S)-aminoalkyl epoxides. The processes described do not make use of hazardous reagents or intermediates, do not require chromatographic purifications, and are thus amenable to the preparation of large quantities of these versatile building blocks.
Stereoselective synthesis of anti-N-protected 3-amino-1,2-epoxides by nucleophilic addition to N-tert-butanesulfinyl imine of a glyceraldehyde synthon
Harried, Scott S.,Croghan, Michael D.,Kaller, Matthew R.,Lopez, Patricia,Zhong, Wenge,Hungate, Randall,Reider, Paul J.
experimental part, p. 5975 - 5982 (2009/12/24)
(Chemical Equation Presented) A di-O-TBS protected glyceraldehyde synthon was condensed with Ellman's reagent to form a bench-stable N-tert-butanesulfinyl imine 6, which served as a common intermediate for the stereoselective introduction of various R groups. The Ellman adducts were converted to useful multifunctional intermediates 18a-i in one pot. The alcohols 18a-i were efficiently elaborated to both known and novel anti-N-protected-3-amino-1,2- epoxides in two steps. Compound 2a is a key intermediate toward HIV protease inhibitors.
Stereoselective synthesis of erythro α-amino epoxides
Rotella, David P.
, p. 5453 - 5456 (2007/10/02)
The stereoselective reduction of bromomethyl ketones derived from leucine, phenylalanine, alanine and valine is described using borohydride reagents. The Boc-amino alcohol product has erythro stereochemistry at the carbinol center as deduced by conversion to Boc-amino epoxides. These oxiranes are useful for the preparation of hydroxyethylene peptide isosteres.
