What is Bu3SnH used for?

What is Bu3SnH used for?

A) Bu3SnH has been used in the preparation of β-hydroxy ketones in a single step via hydrostannylation of α,β-unsaturated ketones in the presence of CuCl followed by aldol reaction of the resulting tin enolates with aldehydes. B)

What does AIBN do in organic chemistry?

Azobisisobutyronitrile (abbreviated AIBN) is an organic compound with the formula [(CH3)2C(CN)]2N2. This white powder is soluble in alcohols and common organic solvents but is insoluble in water. It is often used as a foamer in plastics and rubber and as a radical initiator.

What is Bu3SnH?

Organotin hydrides are very good radical reducing agents due to the relatively weak, nonionic bond between tin and hydrogen (Bu3SnH 74 kcal/mol) that can cleave homolytically.

What is LDA reagent?

Lithium diisopropylamide (commonly abbreviated LDA) is a chemical compound with the molecular formula [(CH3)2CH]2NLi. It is used as a strong base and has been widely utilized due to its good solubility in non-polar organic solvents and non-nucleophilic nature.

Is hydrogen atom a free radical?

Hydrogen atom is the simplest and one of the best studied free radicals (an ope-shell species, doublet state). Reactivity of H atoms is very well studied in gas, liquid and solid phase (plenty of kinetic data are available, mainly from indirect measurements), and it is a typical radical in sense of chemistry.

What is the role of AIBN azobisisobutyronitrile in the polymerisation of styrene?

AIBN (Azobisisobutyronitrile) is an organic compound having formula [(CH3)2C(CN)]2N2. It is white powder, soluble in alcohols and common organic solvents but is insoluble in water. A mixture of styrene and maleic anhydride in toluene will react if heated, forming the copolymer upon addition of AIBN.

What is THF reagent?

THF (Tetrahydrofuran) is a stable compound with relatively low boiling point and excellent solvency. It is widely-used for dissolution and reaction of various substances. Also it is used as a starting material for the synthesis of poly(tetramethylene ether) glycol (PTMG), etc.

What is LDA used for?

LDA is mainly used in classification problems where you have a categorical output variable. It allows both binary classification and multi-class classification. The standard LDA model makes use of the Gaussian Distribution of the input variables.

Why is H+ called a naked proton?

Naked proton: H+. When an electron (e-) is removed from an atom of the most common hydrogen isotope (1H), only a naked proton (a proton with nothing else) remains. This equilibrium for autoionization of water is imprecise because it implies the presence of a naked proton.

Can a stannane be used as a replacement for Bu3SnH?

D. S. Hays, M. Scholl, G. C.Fu, J. Org. Chem., 1996, 61, 6751-6752. A stannane, which is simple to prepare, was successfully used in standard radical reactions as replacement of Bu 3 SnH and Ph 3 SnH.

Can BU3 SNH be added as a solution in acetonitrile?

The Bu 3 SnH was added as a solution in acetonitrile (50 cm 3) except where otherwise indicated.

What is the pump addition of BU3 SNH and the initiator?

Syringe pump addition of Bu 3 SnH and the initiator, AIBN or AIBMe [2- (1-methoxycarbonyl-1-methylethylazo)-2-methylpropionic acid methyl ester], gave better yields than sealed tube reactions when all the reagents were added at the beginning.

What is the chemical name for Bu3SnH?

Stork, G.; Mook, R., Jr. J. Am. Chem. Soc. 1987, 109, 2829. 1. Bu3SnH, AIBN C6H6, 80 oC 2. SiO2, CH2Cl2