Abstract
2,3,4,6-Tetra- O-methyl- d-galactonic acid ( 5) was readily prepared from d-galactono-1,4-lactone ( 1) in 47% yield. The sequence involves tritylation of HO-6 of 1, followed by O-permethylation and deprotection. Lactonization of 5 led to the per- O-methyl- d-galactono-1,6-lactone, which was copolymerized with ε-caprolactone by ring-opening polymerization catalyzed by scandium triflate. The incorporation of the sugar comonomer into the polyester chain was about 10%.
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