A simplistic green and neat procedure was developed for the synthesis of arylmethyl and heteroaryl phosphonates or phosphinates by silica gel supported Lewis acid catalyst, CeCl3.7H2O-SiO2 through Michaelis-Arbuzov reaction under conventional as well as microwave irradiation methods. Herein, tetraalkyl 1,4phenylenebis(methylene)diphosphonates 5(a-d)/dimethyl 1,4-phenylenebis(methylene)bis (phen...

Stable, alkyl-terminated, light-emitting silicon nanoparticles have been synthesized in a continuous process by laser pyrolysis of a liquid trialkyl-silane precursor selected as a safer alternative to gas silane (SiH4). Stabilization was achieved by in situ reaction using a liquid collection system instead of the usual solid state filtration. The alkene contained in the collection liquid (1-dod...

An efficient synthesis of a series of γ-ketoallylphosphonates through a direct conversion of both primary and secondary Morita-Baylis-Hillman (MBH) alcohols by trialkyl phosphites with or without DMAP, used as additive, and under solvent-free conditions, is described herein for the first time. Subsequently, a highly regioselective Luche reduction of the primary phosphonate 2a (R = H) gave the c...

The toxicity of triethyland tri-n-butyl-germanium acetates has been studied after their administration to rats. Both compounds had a low toxicity. Triethylgermanium had less than one-tenth of the toxicity of triethyltin or triethyl-lead and, unlike them, it did not appear to have a predominant action on the central nervous system. In biochemical studies in vitro, tri-n-butylgermanium was found ...

A convenient approach has been developed to α-aminoalkylidenebisphosphonates and their asymmetric phosphonyl-phosphinyl and phosphonyl-phosphinoyl analogues by α-phosphonylation, α-phosphinylation or α-phosphinoylation of 1-(N-acylamino)alkylphosphonates, that, in turn, are easily accessible from N-acyl-α-amino acids. Effective electrophilic activation of the α-position of 1-(N-acetylamino)alky...

The application of stabilization technologies to a radiologically contaminated surface has the potential for reducing spread contamination and, as result, decreasing worker exposure radiation. Three technologies, calcium chloride (CaCl2), flame retardant Phos-Chek® MVP-Fx, and Soil2OTM were investigated evaluate their ability reduce resuspension tracking radiological during response activities ...

Gold(I) complexes of a chiral phosphoric acid-functionalized phosphine the CPA-Phos series enable enantioselective multicomponent reactions between aldehydes, hydroxylamines and cyclic yne-enones, leading to 3,4-dihydro-1H-furo[3,4-d][1,2]oxazines. This represents rare example highly reaction in gold(I) catalysis. The proceed at low catalyst loading provide high yields, total diastereoselectivi...