with organoaluminumreagents are executed to furnish limonene as a major product. Since the reaction of 1, 4, and 5 has proved to proceed much faster than that of neryl phenyl ether under the similar conditions, the rate acceleration is attributed to the novel metal-anchimeric assistance of the aluminum reagents bound with the neighboring hydroxyl group for effecting the generation of the allyl cation
First stekeospecific synthesis of -γ-bisabolene. A method for the concurrent generation of a ring and a tetrasubstituted exocyclic double bond.
作者:E.J. Corey、William L. Seibel
DOI:10.1016/s0040-4039(00)84133-7
日期:1986.1
A short stereospecific synthesis of -γ-bisabolene (1) from an acyclic acetylenic precursor (either 2 or 6) is described.
描述了从无环炔属前体(2或6)简短合成立体异构的-γ-bisabolene(1)。
A simple stereoselective synthesis of -γ-bisabolene
作者:E.J. Corey、William L. Seibel
DOI:10.1016/s0040-4039(00)84134-9
日期:1986.1
A simpleone-flasksynthesis of Z-γ-bisabolene (1) from the acyclic acetylene 2 is described.
描述了一种由无环乙炔2简单合成一瓶Z-γ-bisabolene(1)的方法。
RNA-seq discovery, functional characterization, and comparison of sesquiterpene synthases from Solanum lycopersicum and Solanum habrochaites trichomes
作者:Petra M. Bleeker、Eleni A. Spyropoulou、Paul J. Diergaarde、Hanne Volpin、Michiel T. J. De Both、Philipp Zerbe、Joerg Bohlmann、Vasiliki Falara、Yuki Matsuba、Eran Pichersky、Michel A. Haring、Robert C. Schuurink
DOI:10.1007/s11103-011-9813-x
日期:2011.11
Solanum lycopersicum and Solanum habrochaites (f. typicum) accession PI127826 emit a variety of sesquiterpenes. To identify terpene synthases involved in the production of these volatile sesquiterpenes, we used massive parallel pyrosequencing (RNA-seq) to obtain the transcriptome of the stem trichomes from these plants. This approach resulted initially in the discovery of six sesquiterpene synthase cDNAs from S. lycopersicum and five from S. habrochaites. Searches of other databases and the S. lycopersicum genome resulted in the discovery of two additional sesquiterpene synthases expressed in trichomes. The sesquiterpene synthases from S. lycopersicum and S. habrochaites have high levels of protein identity. Several of them appeared to encode for non-functional proteins. Functional recombinant proteins produced germacrenes, β-caryophyllene/α-humulene, viridiflorene and valencene from (E,E)-farnesyl diphosphate. However, the activities of these enzymes do not completely explain the differences in sesquiterpene production between the two tomato plants. RT-qPCR confirmed high levels of expression of most of the S. lycopersicum sesquiterpene synthases in stem trichomes. In addition, one sesquiterpene synthase was induced by jasmonic acid, while another appeared to be slightly repressed by the treatment. Our data provide a foundation to study the evolution of terpene synthases in cultivated and wild tomato.