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Safety Information

277320

Sigma-Aldrich

1,2-Dibromocyclopentene

97%

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About This Item

Empirical Formula (Hill Notation):
C5H6Br2
CAS Number:
Molecular Weight:
225.91
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.22

Assay

97%

refractive index

n20/D 1.5558 (lit.)

bp

78 °C/5 mmHg (lit.)

density

1.895 g/mL at 25 °C (lit.)

functional group

bromo

storage temp.

2-8°C

SMILES string

BrC1=C(Br)CCC1

InChI

1S/C5H6Br2/c6-4-2-1-3-5(4)7/h1-3H2

InChI key

PNWFXPGGROADNS-UHFFFAOYSA-N

General description

1,2-Dibromocyclopentene undergoes single Br/Mg exchange reaction with iPrMgCl LiCl to yield the corresponding β-bromocyclopentenylmagnesium reagent.

Application

1,2-Dibromocyclopentene has been used in the synthesis of cyclopentene analogs.

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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Christina Despotopoulou et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 14(8), 2499-2506 (2008-01-31)
A single Br/Mg exchange of 1,2-dibromocyclopentene with iPrMgCl LiCl provides the corresponding beta-bromocyclopentenylmagnesium reagent, which can then be reacted with various electrophiles (yields: 65-82 %). In the presence of a secondary alkylmagnesium halide and Li2CuCl4 (2 mol %), these 2-bromoalkenylmagnesium
Gerard M P Giblin et al.
Bioorganic & medicinal chemistry letters, 17(2), 385-389 (2006-11-07)
The discovery of a series of selective EP1 receptor antagonists based on a 1,2-diarylcyclopentene template is described. After defining the structural requirements for EP1 potency and selectivity, heterocyclic rings were incorporated to reduce logD and improve in vitro pharmacokinetic properties.

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