51092-15-0Relevant articles and documents
Novel 5β-hydroxyspirostan-6-ones ecdysteroid antagonists: Synthesis and biological testing
Rivera, Daniel G.,León, Fredy,Coll, Francisco,Davison, Gema P.
, p. 1 - 11 (2007/10/03)
Eight new 5β-hydroxy-spirostan-6-ones bearing hydroxy and amino functions in the A ring, i.e., 3β-OH, 3α-OH, 2β,3β-OH, 2α,3β-OH, 3β-NH2, 2α-NH2-3β-OH, 2β-NH2-3β-OH, and 2β-OH-3β-NH2, were efficiently synthesized, and their antiecdysteroid activities were evaluated on the metamorphosis bioassay of mosquito Aedes aegypti. To our knowledge, these new steroids represent the first 5β-hydroxy-spirostanes which have been tested for antiecdysteroid activity in mosquitoes. The higher antagonistic effect was found for compounds bearing the 3β-hydroxy and 2β,3β-dihydroxy functionality, which show promise as environmental friendly insecticides.
Synthesis of spirostanic analogues of brassinosteroids via homogeneous permanganate dihydroxylation
Rivera, Daniel G.,Pando, Orlando,Leliebre-Lara, Vivian,Coll, Deysma,Leon, Fredy,Coll, Francisco
, p. 53 - 54 (2007/10/03)
Homogeneous non-aqueous permanganate dihydroxylation is used to synthesize spirostanic analogues of brassinosteroids bearing a variety of oxygen functions on ring B.