(R)-3,4,5-Tride­oxy-5,6-didehydro-1,2-O-(2,2,2-trichloro­ethyl­idene)-α-d-gluco­furan­ose-6,3-carbolactone: a new derivative of α-chloralose

The title compound [systematic name: (R)-2-trichloro­methyl-3a,3b,7a,8a-tetra­hydro-5H-pyrano[2′,3′:4,5]furano[2,3-d][1,3]dioxol-5-one], C9H7Cl3O5, a triyclic system that contains a central α-d-furan­ose ring cis-fused with a dioxolane ring as well as a δ-lactone ring, exhibits a twisted conformation. The CCl3 group has an axial orientation. The furan­ose ring approximates an envelope conformation due to the α,β-unsaturated lactone functionality. The asymmetric unit contains two independent mol­ecules with almost identical geometries

New α-chloralose derivatives

Chloralose is an easily available carbohydrate derivative bearing biological properties. It constitutes a convenient starting material for various synthetic developments. Herein we describe the preparation of hydroxylamino derivatives of α-chloralose using well-established synthetic procedures

Convenient intermediates for sugar chemistry: a practical access to tri-<i>O</i>-acylated methyl hexopyranosides

This paper describes the preparation of very useful partially protected methyl hexopyranosides using a practical one-pot technique