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449520

Sigma-Aldrich

Chlorocyclopentadienyl[(4R,5R)-2,2-dimethyl-α,α,α′,α′-tetraphenyl-1,3-dioxolane-4,5-dimethanolato]titanium

97%

Synonym(s):

(4R,5R)-Chloro-cyclopentadienyl-[2,2-dimethyl-1,3-dioxolan-4,5-bis(diphenylmethoxy)]titanium, (R,R)-Duthaler-Hafner reagent, [(4R,5R)-2,2-Dimethyl-1,3-dioxolan-4,5-bis(diphenylmethoxy)]cyclopentadienyl-chlorotitanium

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About This Item

Empirical Formula (Hill Notation):
C36H33ClO4Ti
CAS Number:
132068-98-5
Molecular Weight:
612.96
UNSPSC Code:
12352101
PubChem Substance ID:
24868488
NACRES:
NA.22

Assay

97%

optical activity

[α]20/D -246°, c = 1 in chloroform

mp

209-213 °C (lit.)

SMILES string

Cl[Ti].[CH]1[CH][CH][CH][CH]1.CC2(C)O[C@H]([C@@H](O2)C(O)(c3ccccc3)c4ccccc4)C(O)(c5ccccc5)c6ccccc6

InChI

1S/C31H30O4.C5H5.ClH.Ti/c1-29(2)34-27(30(32,23-15-7-3-8-16-23)24-17-9-4-10-18-24)28(35-29)31(33,25-19-11-5-12-20-25)26-21-13-6-14-22-26;1-2-4-5-3-1;;/h3-22,27-28,32-33H,1-2H3;1-5H;1H;/q;;;+1/p-1/t27-,28-;;;/m1.../s1

InChI key

LTNGUQMGXWBBMV-CRMRIEQBSA-M

Related Categories

Application

A novel highly enantioselective allyl-transfer reagent. Excellent regio-, diastereo-, and enantioselectivities (usually >95% ee, >95% de) are obtained for the addition of allyl nucleophiles to aldehydes. Although this reagent is used in stoichiometric amounts, the chiral ligand and monocyclopentadienyltitanium trichloride can be easily recovered.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Pictograms

Corrosion
GHS05

Signal Word

Danger

Hazard Statements

H314

Hazard Classifications

Skin Corr. 1B

Storage Class Code

8A - Combustible corrosive hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Duthaler, R.O. et al.
Pure and Applied Chemistry. Chimie Pure Et Appliquee, 62, 631-631 (1990)
Duthaler, R.O. et al.
Inorgorganica Chimica Acta, 222, 95-95 (1994)
Duthaler, R.O. et al.
Pure and Applied Chemistry. Chimie Pure Et Appliquee, 64, 1897-1897 (1990)
Duthaler, R.O. Hafner, A.
Chemical Reviews, 92, 807-807 (1992)
A. Hafner et al.
Journal of the American Chemical Society, 114, 2321-2321 (1992)

Articles

TADDOL

The chiral auxiliaries TADDOLs (α,α,α,α-tetraaryl-1,3-dioxolane-4,5- dimethanols) developed by Seebach's group have found numerous applications in asymmetric synthesis ranging from utilization as stoichiometric chiral reagents or in Lewis acid mediated reactions, to roles in catalytic hydrogenation and stereoregular metathesis polymerization.

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