Peng-Fei Xu

A green route to the synthesis of azo compounds

Polyethylene glycol (PEG, average molecular weight 400) was used as an absorbent for NO2, the absorptivity was found to reach up to 97%. PEG·NO2, the resulting absorbent product, proved to be a very efficient, clean and moderate oxidant, It can convert hydrazo derivatives 1 to the corresponding azo compounds 2 for the first time. The spent PEG can be recovered and recycled after the oxidation process.

Novel and Efficient Solid‐State Synthesis of 3‐Alkyl‐6‐Aryl‐s‐triazolo[3,4‐b]‐1,3,4‐thiadiazine Derivatives

Abstract A novel and efficient solid‐state synthesis of s‐triazolo[3,4‐b]‐1,3,4‐thiadiazine derivatives has been reported. Twelve 3‐alkyl‐6‐aryl‐s‐triazolo[3,4‐b]‐1,3,4‐thiadiazine derivatives have been synthesized in excellent yields with short reaction time.

5-Phen­yl-1,3,4-thia­diazol-2-yl 2,3,4,6-tetra­-O-acet­yl-1-thio-β-d-glucopyran­oside

The structure of the title compound, C22H24N2O9S2, is described. This compound consists of a sugar ring and a heterocyclic base linked unusually by an S atom. The sugar is in a 4C1 chair conformation and forms dihedral angles of 49.54 (4) and 33.42 (5)degrees with the thiadiazole and phenyl rings, respectively. The S atom occupies an equatorial position of the sugar ring and lies 1.807 (2) A out of the corresponding mean plane.