Synthesis of L-arabinitol and xylitol monomers for the preparation of polyamides. Preparation of an L-arabinitol-based polyamide

Dihydrochlorides of 1,5-diamino-1,5-dideoxy-2,3,4-tri-O-methyl-L-arabinitol (and xylitol) and pentachlorophenyl esters of 2,3,4-tri-O-methyl-L-arabina ric (and xylaric) acids have been prepared as suitable bifunctional monomer s for linear polycondensations. A new aregic AABB-type L-arabinitol-based p olyamide is also described from the corresponding monomers. It was crystall ine with T-m 250 degreesC, optically active, and soluble in the usual organ ic solvents, including chloroform, and in water. Its M-w obtained by GPC wa s 27,500 with a polydispersity of 1.4. (C) 2001 Elsevier Science Ltd. All r ights reserved.