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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

Quality Level

200

concentration

1 M in toluene

bp

111 °C

density

0.95 g/mL at 25 °C

functional group

phenyl

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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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

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Certificados de análisis (COA)

Lot/Batch Number
SHBJ8656
SHBG7475V
SHBG5452V
SHBG3389V
SHBG3817V

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Stereoselective glycosylations of a family of 6-deoxy-1, 2-glycals generated by catalytic alkynol cycloisomerization.
McDonald FE, et al.
Journal of the American Chemical Society, 122(18), 4304-4309 (2000)
Enantiomeric resolution of fluorous mixture by chiral CD columns: asymmetric reduction of a mixture of fluorous ketones.
Nakamura Y, et al.
Tetrahedron Letters, 44(33), 6221-6225 (2003)
The discovery of long-acting saligenin ? 2 adrenergic receptor agonists incorporating hydantoin or uracil rings.
Procopiou PA, et al.
Bioorganic & Medicinal Chemistry, 19(14), 4192-4201 (2011)
Synthesis, 2643-2643 (2006)
Stereoselective synthesis of (-)-diospongins A and B and their stereoisomers at C-5.
Kawai N, et al.
Tetrahedron, 63(37), 9049-9056 (2007)
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Artículos

CBS Catalysts

We are pleased to offer o-tolyl-CBS-oxazaborolidine as a 0.5 M solution in toluene for your research needs. When protonated with trifluoromethanesulfonimide, these chiral oxazaborolidines generate chiral Lewis acids, which have demonstrated great utility in the enantioselective Diels–Alder reaction.

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.

Contenido relacionado

2-Methyl-CBS-oxazaborolidine

Our company is pleased to offer both enantiomers of 2-methyl-CBS-oxazaborolidine as a dry reagent, in addition to our current offerings as a 1 M solution in toluene.

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