๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

A novel method of annelation

โœ Scribed by C. Schmidt; J. Thazhuthaveetil

Publisher
Elsevier Science
Year
1970
Tongue
French
Weight
91 KB
Volume
11
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

โœฆ Synopsis

In our studies toward the total synthesis of deca-nor trlterpenoids 1.2

we were required to develop a method of annelatlon which allows the incorporation of an angular methyl group and a ketone group at position 11 In quassin 3

The potentiality of general application of this reaction Rrompts us to communicate our results at the present time as applied to 2,6-dimethyl-cyclohexanone

(1). The following sequence provides a 50% overall yield in three steps.

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The cyclization of the A-ring involves the first case of an anionic elkvlation of an anthraquinone at a nosition which is not ortho to a phenolic function.