695-56-7

Basic information

• Product Name: 2-CYCLOPENTEN-1-ONE ETHYLENE KETAL
• Synonyms: 1,4-DIOXASPIRO[4.4]NON-6-ENE;2-CYCLOPENTEN-1-ONE ETHYLENE KETAL;cyclopent-2-en-1-one-ethyleneacetal;1,4-Dioxaspiro[4.4]nonane-6-ene;2-Cyclopenten-1-one ethylene ketal,95%;2-Cyclopenten-1-one Ethylene;2-Cyclopenten-1-one ethylene ketal 95%;1,4-dioxaspiro[4.4]non-8-ene
• CAS NO: 695-56-7
• Molecular Formula: C₇H₁₀O₂
• Molecular Weight: 126.15
• EINECS: 211-783-5
• Product Categories: Dioxanes & Dioxolanes;Dioxolanes;Acetals/Ketals/Ortho Esters;Building Blocks;Chemical Synthesis;Organic Building Blocks;Oxygen Compounds
• Mol File: 695-56-7.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 59-62 °C16 mm Hg(lit.)
• Flash Point: 112 °F
• Appearance: /
• Density: 1.067 g/mL at 25 °C(lit.)
• Vapor Pressure: 2.17mmHg at 25°C
• Refractive Index: n20/D 1.469(lit.)
• Storage Temp.: Refrigerator
• CAS DataBase Reference: 2-CYCLOPENTEN-1-ONE ETHYLENE KETAL(CAS DataBase Reference)
• NIST Chemistry Reference: 2-CYCLOPENTEN-1-ONE ETHYLENE KETAL(695-56-7)
• EPA Substance Registry System: 2-CYCLOPENTEN-1-ONE ETHYLENE KETAL(695-56-7)

Safety Data

• Statements: 10
• Safety Statements: 16
• RIDADR: UN 1993 3/PG 3
• WGK Germany: 3
• HazardClass: 3.2
• PackingGroup: III
• Hazardous Substances Data: 695-56-7(Hazardous Substances Data)

Usage

Chemical Properties

Clear colourless to yellow liquid

Uses

2-Cyclopenten-1-one ethylene ketal was used in the synthesis of 2,3,3,4,7,7-hexahydro-5-methyl-ind-5-en-1-one ethylene ketal.

InChI:InChI=1/C7H10O2/c1-2-4-7(3-1)8-5-6-9-7/h1,3H,2,4-6H2

Upstream product

• 930-30-3 cyclopent-2-enone 
• 107-21-1 ethylene glycol 
• 120-92-3 cyclopentanone 
• 82235-82-3 2-Bromocyclopentanone 1,2-ethanediyl acetal 
• 694-28-0 2-chlorocyclopentanone 
• 697-22-3 6-chloro-1,4-dioxaspiro[4.4]nonane 

Downstream Products

• 133738-96-2 C₁₇H₁₇NO₄ 
• 133738-96-2 C₁₇H₁₇NO₄ 
• 93914-95-5 C₂₁H₂₂O₆S₂ 
• 36341-49-8 6,7-epoxy-1,4-dioxa-spiro[4.4]nonane 
• 77987-80-5 C₂₀H₂₀N₂O₂ 
• 77987-81-6 C₂₀H₂₀N₂O₂ 
• 1046830-87-8 3-(1-methyl-1H-pyrazol-4-yl)-1-(phenylsulfonyl)-5-(1,4-dioxaspiro[4.4]non-6-en-7-yl)-1H-pyrrolo[2,3-b]pyridine 
• 930-30-3 cyclopent-2-enone 

Relevant articles and documents

Preparation of Cyclobutene Acetals and Tricyclic Oxetanes through Photochemical Tandem and Cascade Reactions

We describe a photochemical reaction using two starting materials, a cyclopent-2-enone and an alkene, which are transformed in a controlled manner via the initial [2+2]-photocycloaddition adducts into cyclobutene aldehydes (conveniently trapped as stable acetals) or unprecedented angular tricyclic 4:4:4 oxetane-containing skeletons. These compounds are formed through tandem or triple cascade photochemical reaction processes, respectively. Small libraries of each compound class were prepared, thus suggesting that this photochemistry approach opens new opportunities for synthesis design and for widening molecular diversity.

Distannoxane-catalyzed acetilization of carbonyls

1,3-Disubstituted tetrabutyldistannoxanes catalyze acetilization of carbonyl compounds under mild conditions. Thorough investigations of factors influencing this reaction are given. A variety of synthetically useful carbonyl compounds are efficiently converted to acetals. In particular, acetilization of cyclic α,β-unsaturated ketones is readily achieved which have met with only limited success so far.