Acetone dimethyl ketal

Other related reactions involve TV-fluorenylmethyloxycarbonyl (N-Fmoc) AAs and aliphatic aldehydes (83JOC77) or substituted /-butoxycarbonyl (N-Boc) Aas and 2,2-dimethyoxypropane (acetone dimethyl ketal) (84TL5855 87JOC2361 88TL2019), as well as A-(dimethylthio)methylene derivatives of an AA and aromatic aldehydes [89JCS(P1)1577]. 

Cyclic ketals by transacetalation 0,0 Isopropylidene derivatives of carbohydrates with acetone dimethyl ketal... 

Methyl esters s. 18, 935 with acetone dimethyl ketal as water scavenger, f. methods, s. H. Liliedahl, Acta Ghem. Scand. 20, 95 (1966)... 

Startg. m. refluxed in a mixture of acetone and acetone dimethyl ketal containing p-toluenesulfonic acid with a Dean-Stark trap filled with molecular sieves product. Y 96%. F. e. s. G. Just et al.. Can. J. Chem. 53, 131 (1975). 

A suspension of 8-azaguanosine in acetone containing acetone dimethyl ketal to maintain anhydrous conditions and di-p-nitrophenyl hydrogen phosphate stirred ca. 1 hr. until soln. is complete, and the product isolated after an additional 3 hrs. 2, 3 -0-isopropylidene-8-azaguanosine. Y 90%. F. e. s. A. Hampton, Am. Soc. 83, 3640 (1961). 

Water scavenger, acetone dimethyl ketal as — 17, 231 ----, ethyl propionate as —... 

Acetone dimethyl ketal added during 1.5 hrs. at 110-120° to a stirred soln. of succinic anhydride and benzoic acid in pyridine-diglyme with distillation of the product during ca. 2 hrs. 2-methoxypropene. Y 95%. F. e. s. M. S. Newman and M. C. Vander Zwan, J. Org. Chem. 38, 2910 (1973). 

Acetoacetic ester s. / -Keto-carboxylic acid esters Acetone dimethyl ketal as additive 19, 10 Acetonitrile... 

A mixture of acetone diallyl ketal and acetone dimethyl ketal acidified with p-toluenesulfonic acid, and after 15 min. at 24° made basic by addition of a soln. of Na-methoxide in methanol acetone allyl methyl ketal. Y 96% based on a redistribution ratio of 1 2 1. F. e. s. N. B. Lorette and W. L. Howard, J. Org. Ghem. 25, 521, 525 (1960). 

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