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Synlett 1990; 1990(7): 399-400
DOI: 10.1055/s-1990-21105
DOI: 10.1055/s-1990-21105
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© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved.
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and electronic data processing and storage.Morpholinoallenes by Conjugate Cuprate Addition to (2-Propynylidene)morpholinium Triflates
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Publication History
Publication Date:
08 March 2002 (online)
Conjugate addition of organo-, silyl- and stannylcuprates to (1,3-diphenyl-2-propynylidene)morpholinium triflates yields the respective 4-(1,3-diphenyl-3-R-1,2-propadienyl)morpholines (R = t-Bu, vinyl, phenyl, silyl, stannyl). 1-CH-substituted allenes of this type cannot be isolated, however, since they readily tautomerize to give 2-morpholino-1,3-butadienes.