Abstract
The enamine character of the CH 2-C(11a)=N(11) fragment in the title compounds was studied. Compounds 1 gave 1-dimethylaminomethylene products 5 after Vilsmeier reaction. The 1-formyl derivatives, obtained by alkaline hydrolysis of 5, were isolated as enol tautomers and were very unstable in acid media. On the other hand, acid-promoted elimination of dimethylamine from the Mannich reaction products 7 gave 1-methylene derivatives 8, which showed an interesting reactivity. Thus, 8a dimerized in acid to the ethylidene derivative 9a. 1,4-Dialkyl-compounds 7 and 9a showed a 1,4- syn-stereochemistry.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
