Organocatalyzed Tsuji–Trost reaction: a new method for the closure of five- and six-membered rings
作者:Bojan Vulovic、Filip Bihelovic、Radomir Matovic、Radomir N. Saicic
DOI:10.1016/j.tet.2009.10.006
日期:2009.12
A combination of organotransition metal catalysis and organocatalysis allows for Tsuji–Trost 5-exo- and 6-exo-cyclizations of aldehydes. This transformation can also be accomplished as a catalytic asymmetric reaction, which affords vinylcyclopentane derivatives with up to 98%ee.
Absolute Configuration of Multifidene and Viridiene, the Sperm Releasing and Attracting Pheromones of Brown Algae
作者:Wilhelm Boland、Karin Mertes、Lothar Jaenicke、Dieter G. Müller、Elsbet Fölster
DOI:10.1002/hlca.19830660632
日期:1983.9.21
of the two algal pheromones multifidene 1 and viridiene 2 were determined as (+)-(3S, 4S)-3-[(Z)-1-butenyl]-4-vinylcyclopentene and (+)-(3R, 4S)-3-[(1Z)-1, 3-butadienyl]-4-vinylcyclopentene, respectively. The strategy involves enzyme-initiated asymmetric synthesis of the ring-saturated pheromone analogues (+)-8a and (−)-8b and their subsequent catalytic hydrogenation to the chiral cycloalkanes 9a and
作者:Garry Procter、Andrew T. Russell、Patrick J. Murphy、T.S. Tan、Andrew N. Mather
DOI:10.1016/s0040-4020(01)86648-5
日期:1988.1
Synthetic routes to trace constituents of algal pheromone bouqets and other information-imitating substances
作者:Willhelm Boland、Karin Mertes
DOI:10.1002/hlca.19840670230
日期:1984.3.14
Structural modifications of multifidene (1), viridiene (2) and ectocarpene (5) led to the synthesis of eleven new pheromone components or imitatin substances mostly by Grignard alkylation of cyclopentene and cycloheptadiene synthons. A new lactone α,ω dienol conversion is reported.
Allylsilane cyclisations in organic synthesis; formation of a cyclopentane via cyclisation of an epoxy-allylsilane
作者:Thuan Siah Tan、Andrew N. Mather、Garry Procter、Alan H. Davidson
DOI:10.1039/c39840000585
日期:——
The epoxy-allylsilane (1) was prepared by two routes and cyclised stereoselectively to give the cis-cyclopentane (9) on treatment with TiCl4; equilibration of the aldehyde corresponding to (9) gave the trans-isomer in high yield.