Synthesis of a peracetylated stereoisomer of De Rosa's calditol: Some questions about the correctness of the original structure assigned to this natural product
摘要:
Comparison of the C-13 nmr spectrum of the nonacetate of a synthetic stereoisomer of calditol with that of the nonacetate of the natural product, combined with a comparison of the C-13 nmr spectrum of the peracetate of a hexitol derived from calditol with all known peracetates of open chain hexitols, invalidates the originally proposed structure.
Two-step stereoselective conversion of 5-monosubstituted 1,3-dioxolan-4-ones into selectively protected 2,3-erythro-1,2,3-triols. A route to polyhydroxylated molecules
摘要:
5-Monosubstituted 1,3-dioxolan-4-one 1 are stereoselectively converted into selectively protected 2,3-erythro-1,2,9-triols 3 via Tebbe methylenation, followed by hydroboration-oxidation.
configuration. Luche reduction of ketone 16 afforded diol 17 in high yield (96%) and excellent diastereoselectivity. The Mukaiyama−Michael reaction of pyridones 27a/b with O-silyl ketene acetal 32 gave phenyl selenyl ketones 33a/b with complete stereoselectivity. Elimination of cis-β-hydroxyselenides 34 and 35 effected the regiocontrolled preparation of tetrahydropyridine derivative 29. Several approaches
Diastereoselective Addition of Prochiral Metallo Enolates to Chiral 1-Acylpyridinium Salts
作者:Daniel L. Comins、Jeffrey T. Kuethe、Hao Hong、Frederick J. Lakner、Thomas E. Concolino、Arnold L. Rheingold
DOI:10.1021/ja990024+
日期:1999.3.1
Two-step stereoselective conversion of 5-monosubstituted 1,3-dioxolan-4-ones into selectively protected 2,3-erythro-1,2,3-triols. A route to polyhydroxylated molecules
作者:Edouard Untersteller、Yan Chao Xin、Pierre Sinaÿ
DOI:10.1016/s0040-4039(00)77164-4
日期:1994.4
5-Monosubstituted 1,3-dioxolan-4-one 1 are stereoselectively converted into selectively protected 2,3-erythro-1,2,9-triols 3 via Tebbe methylenation, followed by hydroboration-oxidation.
Synthesis of a peracetylated stereoisomer of De Rosa's calditol: Some questions about the correctness of the original structure assigned to this natural product
作者:Antony J. Fairbanks、Pierre Sinaỹ
DOI:10.1016/0040-4039(94)02388-r
日期:1995.2
Comparison of the C-13 nmr spectrum of the nonacetate of a synthetic stereoisomer of calditol with that of the nonacetate of the natural product, combined with a comparison of the C-13 nmr spectrum of the peracetate of a hexitol derived from calditol with all known peracetates of open chain hexitols, invalidates the originally proposed structure.