Current Organic Chemistry - Volume 10, Issue 17, 2006

The 2006 Natural Product Chemistry and Heterogeneous Catalysis issue of Current Organic Chemistry contains five contributions from eminent scientists in different fileds. The first subject deals with nitroalkanes and their recent synthetic applications. Their chemistry is reviewed by Ballini and coworkers. Mohamad Ali Zolfigol and coworkers provide insights abouth the use of Silica Sulfuric Acid and Silica Chloride as effficient Read More

Solid catalysis is crucial to chemical technology. Innumerable chemical reactions are facilitated by this catalytic system and, in this context, nitroalkanes have been demonstrated a great reactivity under solid catalysis, especially in the formation of new carbon-carbon single bond. In fact, aliphatic nitrocompounds are a valuable source of stabilized carbanions since the high electron-withdrawing power of the nitro group pr Read More

Silica sulfuric acid and silica chloride, two silica based solid acids have been used for various organic functional group transformations either as reagent or as catalyst. All reactions have been carried out under mild and heterogeneous conditions. These reagents were used for C-C, C-N, and C-O bond formation and cleavage and also deprotection of different protecting groups. Silica sulfuric acid was recycled in many cases, a Read More

The development of new catalytic reactions for C-C bond formation has played a significant role in natural products synthesis. In this article we review catalytic C-C bond formation with respect to the carbon atoms' hybridization and the products formed. The reactions of unusual substrates and the development of new reaction conditions and catalyst systems are included. This survey highlights the use of catalysts in natural Read More

The preparation of steroids containing oxygenated functions in suitable positions of the steroid nucleus is of great importance and can be achieved by means of several oxidative processes. In this paper allylic oxidation, β-selective epoxidation, alcohol oxidation and remote functionalization reactions in steroid substrates are reviewed. Focus has been given to catalytic processes because of their major importance from the vi Read More

The synthetic aspects of biomimetic cyclizations of isoprenoid polyenes, simulating one of the key steps in the biosynthesis of terpenoids in living organisms, have been reviewed, with emphasis on transformations carried out on carbocyclic systems. These reactions are made possible by a clever choice of initiating and terminating units of cyclization, and by introducing suitable functional groups on the acyclic precursor whi Read More