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2005
Vitamins
U 0900
07- 213
Rational Approach to Selective and Direct 2-O-Alkylation of 5,6-O-Isopropylidine-L-ascorbic Acid. — A new and general method for the direct alkylation of the
2-OH group in substrate (I) is developed. It proceeds with complete regio- and
chemoselectivity. Additionally, a series of 2-O-alkyl-3-O-acetyl and
2-O-acetyl-3-O-alkyl analogues are prepared in order to clearly define their spectroscopic characteristics and to resolve common inconsistencies of their structure assignment. — (OLABISI, A. O.; WIMALASENA*, K.; J. Org. Chem. 69 (2004) 21,
7026-7032; Dep. Chem., Wichita State Univ., Wichita, KS 67260, USA; Eng.) —
Jannicke
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