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Approaches to avermectin assembly: Synthesis of the spiroketal system

✍ Scribed by Anthony G.M. Barrett; Tony M. Raynham

Publisher: Elsevier Science
Year: 1987
Tongue: French
Weight: 216 KB
Volume: 28
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)96794-7

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✦ Synopsis

A chiral synthesis of the spiroketal moiety of avermectin A2b has been accomplished in 14 steps from (3S(R),&R(S))-3,5-dimethyl-1-hexen-4-01.

The avermectins and the structurally related milbemycins have attracted considerable

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An important reference has been unfortunately omitted : G. Stork & R. Mook Jr. (Tetrahedron Lett., 27, 4529 (1986)), recently reported such tin radical-mediated ethynyl cyclisations.