Borane-methyl sulfide complex

Description

Borane dimethylsulfide (BMS) is a complex of borane with dimethylsulfide. The other common complex of borane is borane-THF. BMS is more stable than borane-THF and is therefore available in higher concentrations. BMS has the drawback of being smelly due to its dimethylsulfide content.

Chemical properties

clear colorless to light yellow solution

The Uses of Borane-methyl sulfide complex

Borane-dimethyl sulfide complex is used for hydroborations and reductions. Used with a dendrimeric supported L-pyrrolidinol in the asymmetric reduction of indanones and tetralones. CBS-catalyzed asymmetric reduction of ferrocenyl-1,3-diketones to 1,3-diols. Highly enantioselective reduction of ketones catalyzed by C3-symmetric tripodal hydroxyamides.

The Uses of Borane-methyl sulfide complex

To a solution of the SM (1.0 g, 6.4 mmol) in THF (18 mL) at 0 C was added BH3-SMe2 (6.4 mL, 12.8 mmol). The reaction mixture was stirred at 0 C for 2 h, then RT for 3 h. The mixture was cooled to 0 C and quenched with sat aq K2CO3 (5 mL). The layers were separated and the aq layer was extracted with EtOAc (2 x 15 mL) and diethyl ether (2 x 15 mL). The combined org layers were dried (Na2SO4) and concentrated to provide the product as a colorless oil. [1.0 g, 100 %]

The Uses of Borane-methyl sulfide complex

Borane-dimethyl sulfide (BH₃ Me₂S) can be used as a reagent:

• For the selective synthesis of 1,3,5-oxygenated compounds from dimethyl 3-oxoglutarate.
• For the conversion of ozonides to alcohols.
• In the CBS-catalyzed asymmetric reduction of ferrocenyl-1,3-diketones to 1,3-diols.
• For enantioselective reduction of ketones to chiral secondary alcohols in the presence of C₃-symmetric tripodal hydroxyamide as a ligand.
• For the hydroboration reduction and other applications.
• With a dendrimeric supported L-pyrrolidinol in the asymmetric reduction of indanones and tetralones.

What are the applications of Application

Borane dimethyl sulfide complex is a convenient and stable source of borane

General Description

Borane dimethyl sulfide complex (BMS) acts as a highly efficient and selective reducing agent in the presence of catalytic sodium tetrahydroborate for α-hydroxy esters. Asymmetric borane reduction of a variety of prochiral ketones with BMS using spiroborate esters as catalyst has been reported.