Synthesis of phosphiranes;

This paper reviews some synthetic methods of phosphirenes briefil.

Four triatomic heterocyclic compounds, cyclopropane, oxacyclopropane, ethyleneimine and thiirane were fully optimized utilizing Gaussian94 program package with a density functional theory (DFT) method B3LYP and an ab initio method MP2 at 6-311 ++G** level, and the theoretical results agrees well with the reference data, which shows that this method is reliable.

In our previous work, a series of aliphatic 1,1-disubstituted taurines were synthesized from aliphatic 2,2-disubstituted thiiranes via the direct ammonia ring-opening reaction in the presence of silver nitrate and subsequent peroxy acid oxidation.

Asymmetric synthesis and crystal structure of 5-(R)-(1'R,2'S,5'R)-menthyloxy-butyrolactone-[3,4-b]-2(S)-6(R)-1-N-cyclohexyl chiral aziridine;

This paper reports a new green ring opening reactions of aziridines with H_2O.

With this context, two kinds of chiral aziridine-based amino alcohol ligands, twokinds of chiral azetidine-based amino alcohol ligands and three kinds of aziridinesulfide ligands have been explored by use of readily available L-amino acids, (S)- or(R)-phenylethylamine.

Asymmetric synthesis of aziridines has been extensively studied,but no general method for the synthesis of 2,2,3-trisubstituted aziridines is available.

The method of insertion of CO_2 into the aziridines moiety utilizing abundant,renewable and nontoxic CO_2 as a feedstock is promising from a green chemistry perspective.