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649309

Sigma-Aldrich

(S)-(−)-2-Methyl-CBS-oxazaborolidine

≥95%

Synonym(s):

(S)-2-methyl-CBS-oxazaborolidine, (S)-CBS reagent, (S)-Me-CBS, (S)-Methyl-CBS

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About This Item

Empirical Formula (Hill Notation):
C18H20BNO
CAS Number:
112022-81-8
Molecular Weight:
277.17
MDL number:
MFCD00078439
UNSPSC Code:
12352005
PubChem Substance ID:
24883643
NACRES:
NA.22

Quality Level

100

Assay

≥95%

form

solid

SMILES string

CB1OC(C2CCCN12)(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-/m0/s1

InChI key

VMKAFJQFKBASMU-KRWDZBQOSA-N

Related Categories

Application

CBS Catalysts for Asymmetric Reduction and Asymmetric Synthesis
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.

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H302,H318

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
SHBG9395V
SHBC5611V
SHBC2296V
SHBB2227V
37696PMV

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Corey, E. J. et al.
Journal of the American Chemical Society, 109, 5551-5551 (1987)
Singh, V. K.
Synthesis, 605-605 (1992)
Cliff R Baar et al.
Journal of the American Chemical Society, 126(26), 8216-8231 (2004-07-01)
A series of enantiopure C1-symmetric metallocenes, [(SiMe2)2[eta5-C5H(CHMe2)2][eta5-C5H2((S)-CHMeCMe3)]]ZrCl2, (S)-2, [(SiMe2)2[eta5-C5H(CHEt2)2][eta5-C5H2((S)-CHMeCMe3)]]ZrCl2, (S)-6, and [(SiMe2)2[eta5-C5HCy2][eta5-C5H2((S)-CHMeCMe3)]]ZrCl2, (S)-7 (Cy = cyclohexyl), zirconocene dichlorides that have an enantiopure methylneopentyl substituent on the "upper" cyclopentadienyl ligand, and diastereomerically pure precatalysts, [(SiMe2)2[eta5-C5H((S)-CHMeCy)(CHMe2)][eta5-C5H3]]ZrCl2, (S)-8a and (S)-8b, which have an
Angewandte Chemie (International Edition in English), 37, 1986-1986 (1998)
Sakai, T. et al.
Tetrahedron, 52, 233-233 (1996)
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Articles

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.

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.

Related Content

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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