86287-64-1Relevant articles and documents
Lewis-acid catalysis of the asymmetric Diels-Alder reaction of dimenthyl fumarate and cyclopentadiene
Kiesman, William F,Petter, Russell C
, p. 957 - 960 (2002)
The effects of Lewis acid catalysts, solvent, catalyst loading, and temperature on the diastereomeric excess in the Diels-Alder reaction of (+)-dimenthyl fumarate and cyclopentadiene were investigated.
Menthol derivatives, mixture thereof, and preparation method and applications of menthol derivatives
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Paragraph 0101; 0104; 0105; 0106, (2018/10/19)
The invention discloses menthol derivatives, a mixture thereof, and a preparation method and applications of the menthol derivatives. Menthol carries out esterification reactions, then molecular design is performed to synthesize the menthol derivatives with a special molecular structure or a special group, and through the modification on the chemical structure, a novel material, which has a highermelting point and low volatility and is applied to temporary cultural relic reinforcement, is provided. The melting points of the menthol derivatives are gradient, the volatile speed of the menthol derivatives is slower than that of menthol, thus the removing of the menthol derivatives is controllable, and the requirements of cultural relic protection can be satisfied. The provided menthol derivatives are used to temporarily strengthen cultural relic onsite, and have a wide application range.
Total Synthesis of (-)-Mucosin and Revision of Structure
Nols?e, Jens M. J.,Antonsen, Simen,G?rbitz, Carl H.,Hansen, Trond V.,Nesman, Jannicke I.,R?hr, ?smund K.,Stenstr?m, Yngve H.
supporting information, p. 15066 - 15076 (2018/11/23)
The first total synthesis of (-)-mucosin (6), an unusual marine hydrindane natural product incorporating a prostaglandin-like submotif, has been achieved. As a result of the campaign, three of the four all-carbon stereocenters in the purported structure 1 have been revised. Of particular note is the excellent control over β-chirality in conjugate addition to ester (-)-22 and the facial selectivity in the subsequent protonation of an intermediate silyl ketene acetal.
Asymmetric synthesis of a new salen type-titanium complex as the catalyst for asymmetric trimethylsilylcyanation of aldehydes
Lin, Zheng-Chang,Chen, Chinpiao
experimental part, p. 726 - 737 (2011/04/23)
This work describes the asymmetric synthesis of a new salen-type ligand via a Diels-Alder reaction and Curtius rearrangement. The ligand with a norbornane skeleton was used in the trimethylsilylcyanation of aldehydes, but the enantioselectivity was 55%ee. The norborane skeleton was cleaved to destroy this rigidity, and the eanatioselectivity was thereby increased to 85%ee.
Total synthesis of the polyenoyltetramic acid polycephalin C
Longbottom, Deborah A.,Morrison, Angus J.,Dixon, Darren J.,Ley, Steven V.
, p. 6955 - 6966 (2007/10/03)
The total synthesis of the polyenoyltetramic acid polycephalin C is described. Key steps of the synthesis include a double Swern oxidation, double Takai reaction and a double Stille reaction. In addition, the absolute stereochemistry of the ring junction
A Useful Synthesis of Chiral Glyoxylates
Fernandez, Franco,Garcia, Gerardo,Rodriguez, Jose E.
, p. 2837 - 2847 (2007/10/02)
A convenient synthesis of the cyclohexyl, (1R,3R,4S)-3-p-methyl and (1S-endo)-2-bornyl glyoxylates, from the respective alcohols and other very available materials, as a model applicable to that of other chiral, sensitive glyoxylates, is described.
Semicorrin Metal Complexes as Enantioselective Catalysts. Part 2. Enantioselective Cyclopropane Formation from Olefins with Diazo Compounds Catalyzed by Chiral (Semicorrinato)copper Complexes)
Fritschi, Hugo,Leutenegger, Urs,Pfaltz, Andreas
, p. 1553 - 1565 (2007/10/02)
Copper complexes of chiral, C2-symmetric semicorrin ligands were found to be efficient catalysts for the cyclopropane formation from olefins with diazo compounds.In the presence of 1 mol-percent of catalyst, alkyl diazoacetates reacted smoothly with termi
