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l-Gulose, an essential component for the antibiotic and antitumor activities of bleomycin A 2 , was synthesized in 47% yield from d-glucono-1,5-lactone. The effective cleavage of acetonides by SnCl 2 in the presence of tert-butyldimethylsilyl ethers was of importance in the course of synthesis. Elaboration of d-glucono-1,5-lactone that includes a step of oxidative degradation by Dess-Martin...
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