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265004

Sigma-Aldrich

(4R,5R)-2,2-Dimethyl-α,α,α′,α′-tetraphenyldioxolane-4,5-dimethanol

97%

Synonym(s):

(−)-2,3-O-Isopropylidene-1,1,4,4-tetraphenyl-L-threitol, (−)-trans-α,α′-(2,2-Dimethyl-1,3-dioxolane-4,5-diyl)bis(diphenylmethanol), (4R,5R)-4,5-Bis(diphenylhydroxymethyl)-2,2-dimethyldioxolane, 1,1,4,4-Tetraphenyl-2,3-O-isopropylidene-L-threitol, TADDOL

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About This Item

Empirical Formula (Hill Notation):
C31H30O4
CAS Number:
93379-48-7
Molecular Weight:
466.57
Beilstein:
3657855
MDL number:
MFCD00064467
UNSPSC Code:
12352005
PubChem Substance ID:
24856048
NACRES:
NA.22

Assay

97%

optical activity

[α]19/D −62.6°, c = 1 in chloroform

mp

193-195 °C (lit.)

SMILES string

CC1(C)O[C@H]([C@@H](O1)C(O)(c2ccccc2)c3ccccc3)C(O)(c4ccccc4)c5ccccc5

InChI

1S/C31H30O4/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/h3-22,27-28,32-33H,1-2H3/t27-,28-/m1/s1

InChI key

OWVIRVJQDVCGQX-VSGBNLITSA-N

Application

Hydrogen-bonding organocatalyst examined in terms of acidity, deprotonation enthalpies and hydrogen bonding

Catalyst involved in synthesis of cyclopropylamines via addition reactions of Grignard reagents to amides

Reactant or reagent involved in:
  • Enantioswitching of catalytic asymmetric hydroboration
  • Synthesis of derivative ligands for asymmetric hydroformylation of alkenes
  • Amide-directed catalytic asymmetric hydroboration of trisubstituted alkenes
  • Addition of deactivated alkyl Grignard reagents to aldehydes

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

Certificates of Analysis (COA)

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Jung-Shen B Tai et al.
Physical review. E, 101(4-1), 042702-042702 (2020-05-20)
Chiral condensed matter systems, such as liquid crystals and magnets, exhibit a host of spatially localized topological structures that emerge from the medium's tendency to twist and its competition with confinement and field coupling effects. We show that the strength
Jung-Shen B Tai et al.
Science (New York, N.Y.), 365(6460), 1449-1453 (2019-10-12)
Starting with Gauss and Kelvin, knots in fields were postulated to behave like particles, but experimentally they were found only as transient features or required complex boundary conditions to exist and could not self-assemble into three-dimensional crystals. We introduce energetically

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.

Chiral Diols

Apart from numerous examples using TADDOLs in metal-catalyzed asymmetric reactions, Rawal recently reported that TADDOLs could be used as Brønsted acid organocatalysts in highly stereoselective hetero-Diels–Alder reactions.

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