254-04-6

Basic information

• Product Name: 2H-chromene
• Synonyms: 2H-chromene;1,2-Benzopyran;1,2-Chromene;2H-1-Benzopyran;3-Chromene
• CAS NO: 254-04-6
• Molecular Formula: C₉H₈O
• Molecular Weight: 132.16
• Mol File: 254-04-6.mol
• Article Data: 11

Chemical Properties

• Melting Point: <25 °C
• Boiling Point: 204.08°C (rough estimate)
• Flash Point: 79.7°C
• Appearance: /
• Density: 1.0993
• Vapor Pressure: 0.169mmHg at 25°C
• Refractive Index: 1.5869
• CAS DataBase Reference: 2H-chromene(CAS DataBase Reference)
• NIST Chemistry Reference: 2H-chromene(254-04-6)
• EPA Substance Registry System: 2H-chromene(254-04-6)

Safety Data

• Hazardous Substances Data: 254-04-6(Hazardous Substances Data)

Usage

Definition

ChEBI: A simplest member of the class of chromene in which the heterocyclic pyran ring has a double bond between positions 3 and 4.

InChI:InChI=1/C9H8O/c1-2-6-9-8(4-1)5-3-7-10-9/h1-6H,7H2

Upstream product

• 254-03-5 4H-1-benzopyran 
• 13610-02-1 1-phenoxy-2-propyne 
• 271-58-9 anthranil 
• 25125-40-0 1-(2-(allyloxy)phenyl)-2-(tetrafluoro-λ⁵-boraneyl)diazene 
• 352-13-6 4-flourophenylmagnesium bromide 
• 491-37-2 2,3-dihydro-4H-1-benzopyran-4-one 
• 122-97-4 3-Phenyl-1-propanol 
• 30518-54-8 3-bromo-2H-chromene 
• 108-24-7 acetic anhydride 

Downstream Products

• 112128-82-2 trans-4-methoxy-3-phenylchroman 
• 6054-00-8 3-phenyl-2H-benzopyran 
• 92496-19-0 4-Phenyl-4H-1-benzopyran 
• 123373-12-6 (6aS,11aS)-9-Methoxy-6a,11a-dihydro-6H-benzo[4,5]furo[3,2-c]chromen-8-ol 
• 123373-13-7 (6aS,6bR,10aS,10bR)-9-Methoxy-6a,6b,10a,10b-tetrahydro-6H-5-oxa-benzo[a]biphenylene-7,10-dione 
• 108335-31-5 rac-(6aR,11aR)-8-hydroxy-3,9-dimethoxypterocarpan 
• 134453-32-0 (6aS,6bR,10aS,10bR)-9-Methoxy-6a,6b,10a,10b-tetrahydro-6H-5-oxa-benzo[a]biphenylene-7,10-dione 
• 87512-57-0 2-(1-ethylprop-2-enyl)phenol 
• 85960-76-5 (E)-2-pent-1-enylphenol 
• 23619-59-2 (E)-2-propenylphenol 
• 87512-65-0 2-(1-isobutylprop-2-enyl)phenol 
• 1745-81-9 o-Allylphenol 
• 38276-75-4 2-(1-phenylallyl)phenol 
• 100-42-5 styrene 

Relevant articles and documents

Direct access to benzofuro[2,3-: B] quinoline and 6 H -chromeno[3,4- b] quinoline cores through gold-catalyzed annulation of anthranils with arenoxyethynes and aryl propargyl ethers

This work reports a facile annulation of anthranils with aryloxyethynes or aryl propargyl ethers to construct useful benzofuro[2,3-b]quinoline and 6H-chromeno[3,4-b]quinoline frameworks, respectively; these heterocycles are not readily available from literature methods despite their biological significance. This high atom- and step-economy strategy is highlighted by a broad substrate scope. The reaction mechanism is proposed to proceed through sequential cyclizations among the oxyaryl group, gold carbene and benzaldehyde of the α-imino gold carbene intermediates.

Iron-catalysed borylation of arenediazonium salts to give access to arylboron derivatives via aryl(amino)boranes at room temperature

Complementary to previously described Miyaura borylation methods, a new access to boron derivatives via aryl(amino)boranes is described. Direct coupling between aryldiazonium salts and diisopropylaminoborane is catalysed by 0.1% ferrocene leading to the formation of a carbon-boron bond. The obtained aryl(amino)boranes could eventually then be transformed into boronic acids, boronates or borates. Copyright

Novel electrochemical route to 2-(α-alkoxyallyl)phenols - Cathodic eliminative ring opening reaction

Electrochemical reduction of 4-alkoxy-3-bromochromans in acetonitrile led to a facile ring cleavage reaction yielding (2(α-alkoxy- allyl)phenols which are not easily accessible.