小注：

Reagent for high yield, low racemisation peptide coupling^[1], mild and efficient reagent for the preparation fo esters from carboxylic acids and alcohols^[2]; for esterification of amino at low temperature^[3], for use in formation of mixed phophonate diesters^[4]. The carboxyphosphonium salts formed by reaction with carboxylic acids can be reduced with NaBH₄, providing a mild method for reduction of acids to alcohols^[5]. Promotes the reaction of aliphatic primary amines with CS₂ to give isothiocyanates which can be isolated in high yield or reacted in situ with nucleophiles^[6].

Ref:

1. Tetrahedron Lett. 1219 (1975)
2. Tetrahedron Lett. 36, 4253(1995)
3. Tetrahedron Lett. 35, 5603(1994)
4. J. Org. Chem., 60, 5214(1995)
5. Tetrahedron Lett., 39, 3319(1988)
6. J. Che. Soc., Chem. Commun., 1995(1995)