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457698

Sigma-Aldrich

(R)-(+)-2-Methyl-CBS-oxazaborolidine solution

1 M in toluene

Sinónimos:

α,α-Diphenyl-D-prolinolmethylboronic acid cyclamide ester, (R)-1-Methyl,3,3-diphenyl-tetrahydro-pyrrolo(1,2-c)(1,3,2)oxazaborole, (R)-Tetrahydro-1-methyl-3,3-diphenyl-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaborole

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About This Item

Fórmula empírica (notación de Hill):
C18H20BNO
Número de CAS:
112022-83-0
Peso molecular:
277.17
MDL number:
MFCD00078440
UNSPSC Code:
12352005
PubChem Substance ID:
24869385
NACRES:
NA.22

concentration

1 M in toluene

bp

111 °C

density

0.95 g/mL at 25 °C

storage temp.

room temp

SMILES string

[H][C@]12CCCN1B(C)OC2(c3ccccc3)c4ccccc4

InChI

1S/C18H20BNO/c1-19-20-14-8-13-17(20)18(21-19,15-9-4-2-5-10-15)16-11-6-3-7-12-16/h2-7,9-12,17H,8,13-14H2,1H3/t17-/m1/s1

InChI key

VMKAFJQFKBASMU-QGZVFWFLSA-N

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Categorías relacionadas

Application

CBS Catalysts for Asymmetric Reduction and Asymmetric Synthesis
(R)-(+)-2-Methyl-CBS-oxazaborolidine solution [1M in toluene] may be used as a catalyst in the asymmetric borane reduction of perfluoroalkyl ketones.
It may also be used in the preparation of:
  • (-)-diospongin B
  • (1R)-2-azido-1-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)ethanol
  • (S)-α-deuteriobenzyl alcohol
  • (3S,4R,5S)-1-(trimethylsilyl)-4,5-epoxyhex-1-yn-3-ol
Excellent catalyst of asymmetric reductions.
The CBS (Corey-Bakshi-Shibata) oxazaborolidine catalyst has been used in the asymmetric reduction of prochiral ketones. Other applications include the enantioselective synthesis of α-hydroxy acids, α-amino acids, C2 symmetrical ferrocenyl diols, and propargyl alcohols.
Used in a desymmetrizing reduction leading to (S)-4-hydroxycyclohexenone.

Physical form

Precipitate may form in storage, but does not affect product quality. Gently heat product to 80−90 °C under an inert atmosphere to redissolve solids.

signalword

Danger

Hazard Classifications

Aquatic Chronic 3 - Asp. Tox. 1 - Eye Dam. 1 - Flam. Liq. 2 - Repr. 2 - Skin Irrit. 2 - STOT RE 2 - STOT SE 3

target_organs

Central nervous system

Storage Class

3 - Flammable liquids

wgk_germany

WGK 3

flash_point_f

39.2 °F - closed cup

flash_point_c

4 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Certificados de análisis (COA)

Busque Certificados de análisis (COA) introduciendo el número de lote del producto. Los números de lote se encuentran en la etiqueta del producto después de las palabras «Lot» o «Batch»

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Artículos

CBS Catalysts

we are pleased to offer both enatiomers of 2-methyl-CBS-oxazaborolidine as a dry reagent, in addition to our current offerings as a 1M solution in toluene.

Asymmetric Catalysis with Chiral Oxazaborolidinium Ions (COBIs)

Learn about the applications of chiral oxazaborolidinium ions (COBIs) as Lewis acid catalysts in different asymmetric reactions such as cyclopropanation, epoxidation, and radical reactions along with details of their catalytic action.

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