Freund R, Martinovi? S, Bernauer K. Diastereoselective Spirocyclization of Imines of 2-Substituted 1H-Indole-3-ethylamines ( = Trypatamines): Variation of the electrophile and the substituent at C(2) and its influence on the steric outcome. 6th Communication on indoles, indolenines, and indolines.
Helv Chim Acta 1992. [DOI:
10.1002/hlca.19920750124]
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