Cyclopropane Compatibility with Oxidative Carbocation Formation: Total Synthesis of Clavosolide A

Cyclopropane Fatty Acid Derivatives: Biosynthesis, Function and Total Synthesis

INTRODUCTION Cyclopropane-containing natural products are very unique owing to their unusual bonding and inherent ring strain (27.5 kcal/mol). 1 This strained ring has been found in naturally occurring terpenes, steroids, amino acids, fatty acids, alkaloids, and nucleic acids. For example, chrysanthemic acid derivatives, produced in plants via isoprenoid pathway are precursors to potent insecti...

Formation of titanacyclobutenes with a spiro-bonded cyclopropane.

The reaction of titanium cyclopropylidene complexes, prepared by the reductive titanation of 7,7-dichlorobicyclo[4.1.0]heptanes, with alkynes produced air and moisture stable titanacyclobutenes with a spiro-bonded cyclopropane.

Tandem Allylboration–Prins Reaction for the Rapid Construction of Substituted Tetrahydropyrans: Application to the Total Synthesis of (−)‐Clavosolide A

Tetrahydropyrans are common motifs in natural products and have now been constructed with high stereocontrol through a three-component allylboration-Prins reaction sequence. This methodology has been applied to a concise (13 steps) and efficient (14 % overall yield) synthesis of the macrolide (-)-clavosolide A. The synthesis also features an early stage glycosidation reaction to introduce the x...

single-step synthesis of multi-component spirobarbiturates using ionic liquids and synthesis of substituted pyridine filled with catalysts supported on solid substrate

in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...

Heats of combustion and formation of cyclopropane.