Synthesis of a chiral 1,7-dioxaspiro[5,5]undecene. A model for the spiroacetal subunit of avermectin B1a
β 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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β¦ 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.
π SIMILAR VOLUMES
## Abstract The synthesis of spiroketals from nitro ketones is described. Racemic __trans__β2βMethylβ1,7βdioxaspiro[5.5]undecane (1a), and 2,8βdimethylβ1,7βdioxaspiro[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