A synthetic approach to the C17-benzene ansamycins via metal catalyzed C-C coupling is described. Key bond formations include direct iridium catalyzed carbonyl crotylation from the alcohol oxidation level followed by che...
The use of aryl triflates as reaction partners in a palladium-catalyzed domino direct arylation/N-arylation provides a great advantage due to the availability of starting materials. Furthermore, it allows expedient acces...
Tertiary allyl- or crotylsilanes have been prepared in high er and dr via the lithiation-borylation reaction of alkyl carbamates with silaboronates. Using a related strategy, quaternary allylsilanes could be accessed in ...
An easily prepared cinchona alkaloid derivative was found to be an effective organocatalyst in a direct, enantioselective aza-Mannich addition. By establishing a quaternary carbon stereocenter, a series of modified chira...
A new chemodosimetric probe (1) is reported that selectively detects thiols over other relevant biological species by the turning on of its fluorescence through a Michael type reaction. The fluorogenic process upon its r...
Schiglautone A (1), a unique 6/7/9-fused tricyclic carbon backbone triterpenold, was Isolated from the stems of Schisandra glaucescens. Its structure was determined on the basis of spectroscopic analysis and single-cryst...
A tandem one-pot reaction of an aldehyde with a primary amine involving condensation and then cyclization (N-alkylation), followed by intramolecular dipolar cycloaddition of the resulting nitrone or azomethine ylide, pro...
A linker-attached tetrasaccharide corresponding to the linkage region of proteoglycans was synthesized via one-pot procedures from the silylated monosaccharide derivatives. Regioselective one-pot protection protocols wer...
A facile preparation of arylmethyl and heteroarylmethyl phosphonate esters was achieved involving a Lewis acid mediated Michaelis-Arbuzov reaction at room temperature. Interaction of arylmethyl halides/alcohols with trie...
An efficient copper-catalyzed approach to quinazolinone derivatives has been developed, and the protocol uses cheap and readily available substituted 2-halobenzamides and (aryl)methanamines as the starting materials as w...
Michael addition of carbethoxymethylenetriphenylphosphorane (a Wittig reagent) to nitroalkenes, followed by a reaction with ethyl formylformate and cinnamaldehydes, or formaldehyde and cinnamaldehydes, provided the respe...
Two series of 3(10)-helical peptides of different lengths and rigidity, based on the strongly foldameric alpha-aminoisobutyric acid and containing a terminal ferrocenyl unit, have been synthesized. Oxidation-state sensit...
Pd-II-catalyzed aromatic C-H bond activation using cyano as a directing group was carried out in TFA medium. Biphenyl-2-carbonitrile derivatives were therefore synthesized from aryl nitriles and aryl halides in moderate ...
The coumarin-based probe Cu(II)-COT1 was successfully developed for the detection of HNO on the basis of the reduction reaction. In addition, highly selective "turn on" type fluorogenic behavior upon the addition of Ange...
Quantum chemical calculations were used to assess the viability of proposed secondary carbocations as intermediates in the biosynthesis of avermitilol. One, a cyclopropylcarbinyl cation, was found to be a true minimum, w...
Silver(I) fluoride-mediated Pd-catalyzed C-H direct arylation/heteroarylation of 3-bromolsothiazole-4-carbonitrile (1a) gives twenty-four 5-aryl/heteroaryl-3-bromolsothiazole-4-carbonitriles. The reaction was partially o...