A Concise, Efficient and Production-Scale Synthesis of a Protected l-Lyxonolactone Derivative: An Important Aldonolactone Core
A multikilogram-scale synthesis of l-lyxonolactone-2,3-O-isopropylidene is reported. It proceeds efficiently from an optimized, large-scale, aqueous bromine oxidation of d-ribose to d-ribonolactone including a one-pot isopropylidene formation, and subsequent conversion of the d-ribonolactone-2,3-O-i...
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Veröffentlicht in: | Organic process research & development 2006-05, Vol.10 (3), p.484-486 |
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creator | Batra, Hitesh Moriarty, Robert M Penmasta, Raju Sharma, Vijay Stanciuc, Gabriela Staszewski, James P Tuladhar, Sudersan M Walsh, David A Datla, Satyanarayana Krishnaswamy, Sunderraj |
description | A multikilogram-scale synthesis of l-lyxonolactone-2,3-O-isopropylidene is reported. It proceeds efficiently from an optimized, large-scale, aqueous bromine oxidation of d-ribose to d-ribonolactone including a one-pot isopropylidene formation, and subsequent conversion of the d-ribonolactone-2,3-O-isopropylidene to l-lyxonolactone-2,3-O-isopropylidene via the derived C5-mesylate and intramolecular relactonization of the product of aqueous potassium hydroxide cleavage of the d-ribonolactone ring. The inversion of configuration at the C4-chiral center is understood in terms of an intermediating C4−C5-epoxide. The overall process is noteworthy for its operational simplicity, stereochemical integrity, and use of inexpensive chemicals. |
doi_str_mv | 10.1021/op050222n |
format | Article |
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Process Res. Dev</addtitle><date>2006-05-01</date><risdate>2006</risdate><volume>10</volume><issue>3</issue><spage>484</spage><epage>486</epage><pages>484-486</pages><issn>1083-6160</issn><eissn>1520-586X</eissn><abstract>A multikilogram-scale synthesis of l-lyxonolactone-2,3-O-isopropylidene is reported. It proceeds efficiently from an optimized, large-scale, aqueous bromine oxidation of d-ribose to d-ribonolactone including a one-pot isopropylidene formation, and subsequent conversion of the d-ribonolactone-2,3-O-isopropylidene to l-lyxonolactone-2,3-O-isopropylidene via the derived C5-mesylate and intramolecular relactonization of the product of aqueous potassium hydroxide cleavage of the d-ribonolactone ring. The inversion of configuration at the C4-chiral center is understood in terms of an intermediating C4−C5-epoxide. The overall process is noteworthy for its operational simplicity, stereochemical integrity, and use of inexpensive chemicals.</abstract><pub>American Chemical Society</pub><doi>10.1021/op050222n</doi><tpages>3</tpages></addata></record> |
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title | A Concise, Efficient and Production-Scale Synthesis of a Protected l-Lyxonolactone Derivative: An Important Aldonolactone Core |
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