The use of orthoformates in the preparation of ketals is a standard operating procedure. Relatively few of the many preparations have employed orthoformates other than triethyl orthoformate. Post (1) has stated the yields decrease with an increase in size of the trialkyl part of the molecule. Dykstra (2) claimed good yields with the tripropyl and tributyl orthoformates although exact values were not given and the experimental details were not reported.
2) Garelli and Racciu, Alli acad. sci. Torino, Classe rci. lis, mal. (3) Technical monoethanolamine, boiling at 169-171 O, from Car-Vol. I, p. 114. nal., 69, I, 358-03 (1934). bide and Carbon Chemicals Corporation, was used.
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