Synthese du compose du titre a partir du cyclohexadiene-1,3 avec pour etape cle laformation par voie photochimique de la tricyclo [3.3.0.0 2,8]octanone-3
Design of an Organocatalyst for the Enantioselective Diels−Alder Reaction with α-Acyloxyacroleins
作者:Kazuaki Ishihara、Kazuhiko Nakano
DOI:10.1021/ja053368a
日期:2005.8.1
derived from H-l-Phe-l-Leu-N(CH2CH2)2. The enantioselective Diels-Alderreaction of 5-(benzyloxymethyl)cyclopentadiene, cyclopentadiene, cyclohexadiene, 2,3-dimethylbutadiene, and isoprene with alpha-(p-methoxybenzoyloxy)acrolein catalyzed by the above chiral ammonium salt (2.5-20 mol %) at -20-22 degrees C gave the corresponding adducts with 83, 83, 91, 92, and 88% ee, respectively.
The regioselective outcome of ring rearrangement metathesis transformations performed on bicyclo[2.2.2]oct-2-ene derivatives
作者:Patricia E. Standen、Marc C. Kimber
DOI:10.1016/j.tetlet.2013.05.112
日期:2013.7
Treatment of bicyclo[2.2.2]oct-2-en-7-one with organometallic reagents gives the addition products in good yield and moderate diastereoselectivities in favour of the syn-products. Subsequent exposure of these addition products to ruthenium catalysed ring rearrangement metathesis (RRM) conditions reveals significant product divergence as a consequence of the newly acquired stereocentre.
The invention relates to compounds of formula (I), wherein R
1
, R
2
, R
1a
, R
2a
, R
3
, R
4
, A, B, X, W and n are as defined in the description, and pharmaceutically acceptable salts of such compounds. These compounds are useful as calcium channel blockers.
Hayes, Christopher J.; Simpkins, Nigel S.; Kirk, Douglas T., Journal of the American Chemical Society, 2009, vol. 131, p. 8196 - 8210
作者:Hayes, Christopher J.、Simpkins, Nigel S.、Kirk, Douglas T.、Mitchell, Lee、Baudoux, Jerome、et al.
DOI:——
日期:——
Enantioselective Pathway for the Synthesis of Laurenditerpenol
作者:Santanu Mukherjee、Alex P. Scopton、E. J. Corey
DOI:10.1021/ol1004802
日期:2010.4.16
Simple enantioselective routes to the two key intermediates shown above (at center) for the synthesis of laurenditerpenol have been developed using a Diels-Alder step and the same catalyst system for each.