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136581

Sigma-Aldrich

1,5-Diazabicyclo[4.3.0]non-5-ene

98%

Synonym(s):

DBN

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About This Item

Empirical Formula (Hill Notation):
C7H12N2
CAS Number:
3001-72-7
Molecular Weight:
124.18
Beilstein:
2417
EC Number:
221-087-3
MDL number:
MFCD00005554
UNSPSC Code:
12352005
PubChem Substance ID:
24848287
NACRES:
NA.22

Assay

98%

form

liquid

refractive index

n20/D 1.519 (lit.)

bp

95-98 °C/7.5 mmHg (lit.)

density

1.005 g/mL at 25 °C (lit.)

SMILES string

C1CN=C2CCCN2C1

InChI

1S/C7H12N2/c1-3-7-8-4-2-6-9(7)5-1/h1-6H2

InChI key

SGUVLZREKBPKCE-UHFFFAOYSA-N

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General description

DBN is a strong base widely used as a catalyst in organic synthesis to facilitate Michael additions and aldol condensations.

Application

1,5-Diazabicyclo[4.3.0]non-5-ene (DBN) can be used as:      
  •   A reagent for the synthesis of β-carbolines from tetrahydro-β-carbolines via dehydrogenative/decarboxylative aromatization.       
  • A nucleophilic organocatalyst in the regioselective C-acylation of pyrroles and indoles by Friedel−Crafts acylation reaction.
  •   A superbase in the formulation of a ternary liquid-liquid phase changing system, along with hexadecane and hexanol, to capture hydrogen sulfide gas.      
  • A base for the preparation of 1H-quinazoline-2,4-diones from 2-aminobenzonitriles using supercritical carbon dioxide as a reactant and a solvent.
  •   A catalyst for the synthesis of benzothiazolones by the reaction between 2-aminothiophenols and CO2 by cyclocarbonylation reaction via C-S bond formation.

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)

201.2 °F - closed cup

Flash Point(C)

94 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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The simple solvent-free synthesis of 1H-quinazoline-2, 4-diones using supercritical carbon dioxide and catalytic amount of base
Mizuno T, et al.
Tetrahedron Letters, 45(38), 7073-7075 (2004)
Organic base-promoted efficient dehydrogenative/decarboxylative aromatization of tetrahydro-βcarbolines into β-carbolines under air.
Zhao Z, et al.
Tetrahedron Letters, 60(11), 800-804 (2019)
Phase-Change Reversible Absorption of Hydrogen Sulfide by the Superbase 1, 5-Diazabicyclo [4.3. 0] non-5-ene in Organic Solvents.
Xu Z, et al.
Industrial & Engineering Chemistry Research, 58(4), 1701-1710 (2019)
Ryuichi Arakawa et al.
Journal of mass spectrometry : JMS, 40(1), 66-69 (2004-12-08)
When elemental selenium was added to a strongly basic amine, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), the selenium started to dissolve and the solution turned dark brown. We investigated the chemical reaction of this selenium dissolution process by electrospray ionization mass
Organic Base-Catalyzed C-S Bond Construction from CO2: A New Route for the Synthesis of Benzothiazolones.
Gao Xiang, et al.
Catalysts, 8(7), 271-271 (2018)
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