ChemInform Abstract: An Efficient Synthesis of N-Unsubstituted Imines as Organoborane Adducts Stable at Room Temperature: New Promising Intermediates for Synthesis.
Abstract
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ChemInform Abstract
N-Trimethylsilyl- or N-diisobutylaluminoimines are readily methanolyzed in the presence of boranes to afford N-unsubstituted aldimine— as well as ketimine—borane adducts as (E)-isomers exclusively. Methanolysis of the mixture of enamine isomers (VIII)—(XI) in the presence of borane (IV) affords solely the stable ketimine—borane adduct (XII) as result of conversion of isomers (IX)-(XI) to the ketimine form.
