3055-90-1Relevant academic research and scientific papers
Total synthesis of (+) - Leiocarpin and (±) isohemileiocarpin
Narkhede,Iyer,Iyer
, p. 2031 - 2034 (1990)
(±)-Leiocarpin 11 has been synthesised by Heck arylation of the bischromene 10, with 2-chloromercurio-4,5- methylenedioxyphenol. Further, a new pterocarpan 12, an Isomer of the naturally occurring hemillelocarpin and named Isohemllelocarpin has also been synthesised by a similar arylation of the bischromene 10 with 3-methoxy-2-chloromercuriophenol. The formation of 11 and 12, Indicate the selective reactivity of one of the chromene rings in 10.
Structure and Synthesis of Isoflavonoid Analogues from Neorautanenia amboensis Schinz
Breytenbach, Jaco C.,Rall, Gerhardus J.H.
, p. 1804 - 1809 (2007/10/02)
The isolation and structural elucidation of six pterocarpans: neorautenane, neorautanol, edulenane, edulenanol, ambonane, and neorautenanol, as well as two new isoflavanones: ambonone and neoraunone, are reported.The structures of neorautenane and neoraut
Araliphatic diisocyanates
-
, (2008/06/13)
Novel araliphatic diisocyanates having the formula are disclosed wherein X is oxygen or a single bond and Ar is an arylene radical. The araliphatic diisocyanates are prepared from well known and readily obtainable starting materials. When X represents a single bond, the starting material is a monohydric phenol wherein a C-alkylation reaction followed by an O-alkylation reaction with acrylonitrile provides an intermediate dipropionitrile which is converted to the diisocyanate via phosgenation of the corresponding diamine. When X represents oxygen, the starting material is a dihydric phenol wherein O-alkylation with acrylonitrile provides the dipropionitrile which in turn is converted to the diisocyanate via the phosgenation of the corresponding diamine. The diisocyanates find particular utility in the preparation of color and light stable polyurethane products.
