Total Synthesis of the Epidermal Growth Factor Inhibitor (−)-Reveromycin B
作者:Anthony N. Cuzzupe、Craig A. Hutton、Michael J. Lilly、Robert K. Mann、Kenneth J. McRae、Steven C. Zammit、Mark A. Rizzacasa
DOI:10.1021/jo001646c
日期:2001.4.1
The total synthesis of the epidermal growth factor inhibitor reveromycin B (2) in 25 linear steps from chiral methylene pyran 13 is described. The key steps involved an inverse electron demand hetero-Diels-Alderreaction between dienophile 13 and diene 12 to construct the 6,6-spiroketal 11 which upon oxidation with dimethyldioxirane and acid catalyzed rearrangement gave the 5,6-spiroketal aldehyde
An efficient nano-Cu2O-catalyzed cascade multicomponent reaction of 2-halobenzoic acids and trimethylsilyl cyanide with diverse amines was developed using water as a solvent, affording versatile N-substituted phthalimide derivatives in moderate to excellent yields. This novel strategy features carbon monoxide gas-free, environmentallybenign, one-pot multistep transformation, commercially available
The first synthesis of (+)-crocacin C (3) in optically pure form is achieved following a convergent strategy. The synthesis also establishes the absolute stereochemistries of this novel class of potent antifungal and highly cytotoxic compounds. The naturally occurring crocacin C has (6S,7S,8R,9S) configuration, which is also the same for other congeners of the family, crocacins A, B and D.
Fluorinated trienes and their use as rxr modulators
申请人:——
公开号:US20040248919A1
公开(公告)日:2004-12-09
The present invention relates to a method of modulating retinoid X receptor activity in a mammal, novel compounds and pharmaceutical compositions for modulating retinoid X receptor activity in a mammal, and methods of making compounds that modulate retinoid X receptor activity in a mammal. The compounds are represented by Structural Formula 1: The compounds of Structural Formual 1 are efficacious insulin sensitizers and do not have the undesirable side effects of increasing triglycerides or suppressing the thyroid hormone axis.
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Palladium-Catalyzed Stereoretentive Olefination of Unactivated C(sp<sup>3</sup>)–H Bonds with Vinyl Iodides at Room Temperature: Synthesis of β-Vinyl α-Amino Acids
作者:Bo Wang、Chengxi Lu、Shu-Yu Zhang、Gang He、William A. Nack、Gong Chen
DOI:10.1021/ol503248f
日期:2014.12.5
A method is reported for palladium-catalyzed N-quinolyl carboxamide-directed olefination of the unactivated C(sp(3))H bonds of phthaloyl alanine with a broad range of vinyl iodides at room temperature. This reaction represents the first example of the stereoretentive installation of multisubstituted terminal and internal olefins onto unactivated C(sp(3))H bonds. These methods enable access to a wide range of challenging beta-vinyl a-amino acid products in a streamlined and controllable fashion, beginning from simple precursors.