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“Tert-amino effect” in heterocyclic synthesis. Ring closure reactions of N,N-dialkyl-1,3-dien-1-amines

✍ Scribed by W. Verboom; D. N. Reinhoudt

Book ID
104589186
Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
885 KB
Volume
109
Category
Article
ISSN
0165-0513

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## Abstract Addition of 9,10‐phenanthrenequinone or 3,5‐di‐__tert__‐butyl‐__o__‐benzoquinone to __N,N__‐dialkyl‐3‐alken‐1‐ynyl‐1‐amines R^2^‐CHCH‐C≡C‐NR^1^~2~ (**4**) gives quinoid α‐alkenyl‐γ‐oxo‐α,β‐unsaturated carboxamides **6** or **8**, respectively; these undergo a spontaneous ring‐closure,