35071-66-0

Basic information

• Product Name: 1-Isopropyl-1,3-cyclopentadiene
• Synonyms: 1-Isopropyl-1,3-cyclopentadiene
• CAS NO: 35071-66-0
• Molecular Formula: C₈H₁₂
• Molecular Weight: 108.18
• Mol File: 35071-66-0.mol
• Article Data: 6

Chemical Properties

• Boiling Point: 131.6°C at 760 mmHg
• Flash Point: 16.1°C
• Appearance: /
• Density: 0.862g/cm³
• Vapor Pressure: 11.3mmHg at 25°C
• Refractive Index: 1.487
• CAS DataBase Reference: 1-Isopropyl-1,3-cyclopentadiene(CAS DataBase Reference)
• NIST Chemistry Reference: 1-Isopropyl-1,3-cyclopentadiene(35071-66-0)
• EPA Substance Registry System: 1-Isopropyl-1,3-cyclopentadiene(35071-66-0)

Safety Data

• Hazardous Substances Data: 35071-66-0(Hazardous Substances Data)

Usage

Appearance

Colorless liquid

Odor

Strong

Usage

Precursor in the synthesis of various organic compounds, production of agrochemicals, pharmaceuticals, and specialty chemicals, reactive intermediate in organic synthesis (preparation of substituted cyclopentenones and cyclopentenes)

InChI:InChI=1/C8H12/c1-7(2)8-5-3-4-6-8/h3-5,7H,6H2,1-2H3

Upstream product

• 2307-69-9 toluene-4-sulfonic acid isopropyl ester 
• 542-92-7 cyclopenta-1,3-diene 
• 2175-91-9 6,6'-dimethyl fulvene 
• 4984-82-1 sodium cyclopentadienide 
• 75-26-3 isopropyl bromide 

Downstream Products

• 916991-51-0 3-tert-butyl-1-isopropyl-6-phenylfulvene 
• 35071-52-4 7,7-dichloro-3-isopropylbicyclo[3.2.0]hept-2-ene-6-one 

Relevant articles and documents

Method for manufacturing substituted cyclopentadiene

The present invention relates to a method for producing substituted cyclopentadiene using a strong base and an ether solvent having a high boiling point. Using this method, economical mass production of high purity alkyl substituted cyclopentadiene is possible.

A high-purity chinese juniper methyl alcohol of preparation method (by machine translation)

The invention discloses a method for preparing high-purity chinese juniper methyl alcohol, cyclopentadiene activated reagent after activation with isopropyl bromine instead should be containing various isomers of the isopropyl cyclopentadiene, then in the isomer conversion catalyst under the action of the isomerization reaction to obtain 1 - isopropyl cyclopentadiene; 1 - isopropyl cyclopentadiene and [...] react 1 - isopropyl cyclopentadiene and 4, 4 - [...] 5 - one; 1 - isopropyl cyclopentadiene and 4, 4 - [...] 5 - ketone with triethylamine heating reflux generating ring enlargement reaction to obtain the target product chinese juniper methyl alcohol. The invention raw materials used are cheap and easily obtained, and the step A through the isomer of a hydrocarbon conversion catalyst in use significantly reduces the by-product 2 - isopropyl cyclopentadiene and 5 - isopropyl cyclopentadiene generation, improves the yield of products, and Ru (Ac)3 - ZSM - 5 can be repeatedly used for four times still maintains good catalytic activity; step B by adjusting reaction solution in glacial acetic acid, effectively prevent the emergence of the diketone by-product. (by machine translation)

Process for producing hinokitiol

A process for producing hinokitiol which comprises the step of obtaining 1-isopropylcyclopentadiene from cyclopentadiene and an isopropylating agent represented by the general formula R—X wherein R is an isopropyl group and X is a halogen or the like (first step), reacting it with a dihaloketene to obtain a ketene adduct (second step), and decomposing the ketene adduct (third step), said first step comprising the following three steps: a) a preparation step of cyclopentadienyl metal; b) a step of obtaining isopropylcyclopentadiene by isopropylating the cyclopentadienyl metal in an aprotic polar solvent; and c) a step of isomerizing 5-isopropylcyclopentadiene in the product selectively to 1-isopropylcyclopentadiene with heat.