Cyclododecane-dione

Tetrakis(acetylperoxy)cyclododecane, 3810 7,7,10,10-Tetramethyl-l,2,5,6-tetroxecane-3,4-dione, 3349 Trichloromethyl peroxyacetate, 1097... 

Phase-transfer generated diborane has been used for the hydroboration of alkenes and their conversion into alcohols [1,2] and the procedure has also been employed for the cleavage of formamido compounds to yield the amines [3]. Cyclododecan-1,3- and 1,4-diones have been obtained in a 3 1 ratio and overall yield of 59% via... 

Decarboxylation of P-keto-esters is facile in aqueous DMSO, but in less reactive cases decarboxylation is accelerated by sodium chloride. Condensation reactions of dibenzocycloheptadienone (334) with aromatic aldehydes have been reported. Syntheses of the heterocyclic carboxylic acids (335) have been described. No effect of the heterocycle s ring current on the chemical shifts of the methylene protons could be detected in the n.m.r. spectrum of the nonamethylene-thiadiazine dioxide (336), which was prepared from cyclododecane-l,3-dione. ... 

Cycloalkane-1,2-diones dimerize on treatment with base thus cyclodecane-, cyclododecane-, and cyclotetradecane-1,2-diones were converted into (222 n = 7 1% n = 9 or 11, 40%). The major product from cyclodecane-l,2-dione was the conjugated monodehydration product. This could not, however, be dehydrated... 

Oxidation of cis- and trans-cyclododecane-l,2-diols with 1-phenylbut-l-en-3-one and tris(triphenylphosphine)ruthenium dichloride gives good yields of cyclododecane-1,2-dione. ... 

Intermolecular aldol condensation of cyclododecane-l,4-dione gives the bicyclic enone (276), which is further converted into [Tlmetacyclophane. ... 

Equimolar amounts of cyclododeca-l,2-dione and cyclododeca-l,3-dione in a small amount of methanol acidified with a little dil. HGl -> 2-(l-hydroxy-2-oxo-l-cyclododecyl)cyclododecane-l,3-dione. Y almost 100%. K. Schank and D. Wessling, Tetrah. Let. 1967, 1823. 

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