Isoquinolinium N-Arylimides and trans-Cyclooctenes
摘要:
The inertness of isoquinolinium N-arylimides (5a,b) versus common cycloalkenes is overcome by the highly reactive (E)-cyclooctene and (E,Z)-1,5-cyclooctadiene. NMR spectra and an X-Ray analysis established the retention of dipolarophile configuration in the cycloadducts (7a,b) and (9a,b) which were obtained in > 90% yield. Acid-base catalysis effects the opening of the pyrazolidine ring by beta-elimination; the products are 1-[trans-2-arylaminocyclooctyl]isoquinolines (8,10).
Isoquinolinium N-Arylimides and trans-Cyclooctenes
摘要:
The inertness of isoquinolinium N-arylimides (5a,b) versus common cycloalkenes is overcome by the highly reactive (E)-cyclooctene and (E,Z)-1,5-cyclooctadiene. NMR spectra and an X-Ray analysis established the retention of dipolarophile configuration in the cycloadducts (7a,b) and (9a,b) which were obtained in > 90% yield. Acid-base catalysis effects the opening of the pyrazolidine ring by beta-elimination; the products are 1-[trans-2-arylaminocyclooctyl]isoquinolines (8,10).
The inertness of isoquinolinium N-arylimides (5a,b) versus common cycloalkenes is overcome by the highly reactive (E)-cyclooctene and (E,Z)-1,5-cyclooctadiene. NMR spectra and an X-Ray analysis established the retention of dipolarophile configuration in the cycloadducts (7a,b) and (9a,b) which were obtained in > 90% yield. Acid-base catalysis effects the opening of the pyrazolidine ring by beta-elimination; the products are 1-[trans-2-arylaminocyclooctyl]isoquinolines (8,10).