Preparation and nmr spectra of 3‐alken‐1‐Ynylamines and 1,3,5‐Trienylamines

Compounds of the type H2CCR1-CC-CH2-N(C2H5)2 (I), when treated with potassium tert-butoxide in dimethyl sulfoxide are converted predominantly into the 3-alken-1-ynylamines H3C-CR1CH-CC-N(C2H5)2 (IV), while those of the type R2CH2-CR3CH-CC-CH2-N(C2H5)2 (VI) yield 1,3,5-trienylamines R2CHCR3-CHCH-CHCH-N(C2H5)2 (VIII). A discussion of the NMR parameters of the 1,3,5-trienylamines is given.