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Synthesis of a chiral 1,7-dioxaspiro[5,5]undecene. A model for the spiroacetal subunit of avermectin B1a

✍ Scribed by Stephen Hanessian; Antonio Ugolini


Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
820 KB
Volume
130
Category
Article
ISSN
0008-6215

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✦ Synopsis


The stereocontrolled synthesis of a chiral, polyhydroxy 1,7-dioxaspiro-~~,5]undece~e from D-glucose is described. The bicyclic system with a different pattern of substi~tion can be found in a number of biologically important natural products such as the avermectins and the milbemycins.


πŸ“œ SIMILAR VOLUMES


Nitro Ketones in Organic Synthesis: A Ne
✍ Ballini, Roberto ;Bosica, Giovanna ;Schaafstra, Robert πŸ“‚ Article πŸ“… 1994 πŸ› John Wiley and Sons 🌐 English βš– 235 KB

## Abstract The synthesis of spiroketals from nitro ketones is described. Racemic __trans__‐2‐Methyl‐1,7‐dioxaspiro[5.5]undecane (1a), and 2,8‐dimethyl‐1,7‐dioxaspiro[5.5]undecane (1b) are synthesized as a mixture of __trans__, __trans__ and __trans__, __cis__ isomers in a ratio of 6.5:3.5 (separab