@article{
author = "Stefanović, Milutin and Mićović, Ivan V. and Jeremić, Dragoslav and Miljković, Dušan",
year = "1970",
abstract = "Intramolecular cyclization by catalytic hydrogenation of 3β-acetoxy-16-picolinylidene-5-androsten-17-one (IV) (80° and 50-60 atm of hydrogen pressure over Pd/C as catalyst) gives rise to the formation of two cyclic products, namely, 5′,6′,7′,8′-tetrahydro-2′αH-3′αH-9′αH-3β-acetoxy-androst-5-eno [16.17-b]indolizine (VII) and its 9′βH-isomer (VIII), in a total yield of over 80%, the ratio of the two isomers being 3:1. The cyclized products have structures similar to naturally occuring alkaloid solanidine. A mechanism is proposed for the cyclization.",
publisher = "Elsevier",
journal = "Tetrahedron",
title = "Intramolecular cyclization of 3β-acetoxy-16-picolinylidene-5-androsten-17-one by catalytic hydrogenation",
volume = "26",
number = "11",
pages = "2609-2617",
doi = "10.1016/S0040-4020(01)92835-2"
}