Methods of blocking an ethylene response in plants using cyclopropene derivatives
申请人:——
公开号:US20010019995A1
公开(公告)日:2001-09-06
Methods of applying cyclopropene derivatives and compositions thereof to block ethylene receptors in plants are disclosed. One such method comprises applying to the plant an effective ethylene response-inhibiting amount of cyclopropene derivatives or compositions thereof. Also disclosed are methods of inhibiting abscission in plants, methods of prolonging the life of cut flowers, methods of inhibiting ripening of picked fruits, and methods of inhibiting ripening of picked vegetables.
direct addition reaction of chloroform to cyclopropenes under triethylborane-mediated radicalreaction conditions to provide trichloromethylcyclopropanes has been developed. In contrast, using dimethylzinc as a radical initiator led to the formation of unconjugated esters via a domino sequence involving the addition of the trichloromethylradical, rearrangement and ring-opening reactions.
Structural Effects on the Rh<sup>II</sup>-Catalyzed Rearrangement of Cyclopropenes
作者:Paul Müller、Christian Gränicher
DOI:10.1002/hlca.19930760134
日期:1993.2.10
The thermocatalytic rearrangement of 2-alkylcycloprop-2-ene-1-carboxylates (1) in the presence of RhII perfluorobutyrate is regio- and stereospecific and leads to the substituted metallocarbenes 3. The latter undergo intramolecular CH bond insertion to form cyclopentylidenes (4). In contrast, the metallocarbenes 19, derived from 2,3-dialkylcycloprop-2-ene-1-carboxylates 6c, d, react to dienes (Z)-20
The present invention relates to the field of perfumery. More particularly, it concerns a composition of matter comprising a compound of formula (I) as defined below wherein the weight ratio of the cis-diastereoisomers to the trans-diastereoisomers is comprised in the range between 90:10 and 99.5:0.5 and comprising at least 10% w/w of cis-(1S,2R) diastereoisomer. Said composition of matter is a useful perfumery ingredient, and therefore the present invention comprises the invention composition of matter as part of a perfuming composition or of a perfuming consumer product.