108331-39-1Relevant academic research and scientific papers
Steric effects on the regioselectivity in two-step Diels-Alder reactions of 1,2,4,5-tetrazines with 2-cyclopropylidene-4,5-dihydro-1,3-dimethyl- imidazolidine
Hartmann, Klaus-Peter,Heuschmann, Manfred
, p. 4213 - 4218 (2007/10/03)
The regioselectivity of the two-step Diels-Alder reaction of unsymmetrically substituted tetrazines 4 with 2-cyclopropylidene- imidazolidine 6 is investigated. The first reversible step of the cycloaddition affording zwitterions 7 and 8 is controlled by s
