References
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- Hauser , C. R. , Swamer , F. W. and Adams , J. T. 1954 . Org. Reactions, VIII , : 59
- Hooz , J. and Linke , S. 1968 . J. Amer. Chem. Soc. , 90 : 5936 The yield-limiting step is the initial reaction of the α-diazo ketone with the hindered tri-sec-alkyl-borane, cf.
- K⊘ster , R. and Fenzl , W. 1968 . Angew. Chem. Internat. Ed. , 7 : 735 Earlier studies have shown thatin situ generation of vinyloxyboranes via direct deprotonation of unsymmetric ketones by various R2BX reagents is non-regiospecific, gives poor (ca. 7%) yields of boroxazines for trialkylborane homologs higher than triethylborane, and requires thermal autoclave conditions. Aryl derivatives have been prepared by a disproportionation reaction, a process inapplicable to alkyl derivatives.;W. Fenzl and R. K⊘ster, ibid, 10, 750 (1971); W. Fenzl and R. K⊘ster, Liebigs Ann. Chem., 1322 (1975); M. J. S. Dewar and R. C. Dougherty, Tetrahedron Lett., 16, 907 (1964)
- Benderly , Dr. A. The terminal enol borane was prepared by hydride transfer from dicyclohexylborane to the corresponding α-diazoketone. Unpublished method of
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