10423-18-4

Basic information

• Product Name: Spiro[cyclopropane-1,9'-[9H]fluorene], 2-phenyl-
• CAS NO: 10423-18-4
• Molecular Formula: C21H16
• Molecular Weight: 268.358
• Mol File: 10423-18-4.mol
• Article Data: 7

Chemical Properties

• CAS DataBase Reference: Spiro[cyclopropane-1,9'-[9H]fluorene], 2-phenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Spiro[cyclopropane-1,9'-[9H]fluorene], 2-phenyl-(10423-18-4)
• EPA Substance Registry System: Spiro[cyclopropane-1,9'-[9H]fluorene], 2-phenyl-(10423-18-4)

Safety Data

• Hazardous Substances Data: 10423-18-4(Hazardous Substances Data)

Upstream product

• 96617-39-9 3,6-dimethoxy-9-fluorenone hydrazone 
• 486-25-9 9-fluorenone 
• 100-42-5 styrene 
• 13629-22-6 fluoren-9-ylidene-hydrazine 
• 52341-51-2 N'-(9H-fluoren-9-ylidene)-4-methylbenzenesulfonohydrazide 
• 96617-38-8 2-<2-(3-methoxyphenyl)-2-(4-methoxyphenyl)>-4,4-dimethyl-2-oxazoline 
• 96617-37-7 N-(2-Hydroxy-1,1-dimethyl-ethyl)-2,4-dimethoxy-benzamide 
• 13235-07-9 3,6-dimethoxy-9H-fluoren-9-one 
• 39828-35-8 2,4-dimethoxybenzoyl chloride 
• 91-52-1 2,4 dimethoxybenzoic acid 
• 13234-75-8 3',5'-dimethoxy-[1,1'-biphenyl]-2-carboxylic acid 
• 64957-84-2 4,5-dihydro-2-(2',4'-dimethoxyphenyl)-4,4-dimethyloxazole 
• 832-80-4 9-diazofluorenone 
• 5653-33-8 2-(9-fluorenylidene)-1-phenylethanone 

Relevant articles and documents

Cycloadditions of Diazoalkanes to Enol Ethers Catalyzed by Chromium Complexes - The First Direct Spectroscopic Observation of a Carbene Complex Intermediate

Keywords: carbene complexes; chromium; cyclopropanations; homogeneous catalysis

Intermolecular metal-free cyclopropanation of alkenes using tosylhydrazones

We describe the first general method for the metal-free cyclopropanation of alkenes by using N-tosylhydrazones as an in situ source of diazo compounds. This new method works with a wide variety of alkenes (styrene derivatives, dienes, enynes, and electron-deficient alkenes) by using N-tosylhydrazones derived from various ketones or aldehydes (aromatic, aliphatic, enones). The reaction is performed with the use of K2CO3 as a base to form the diazo species and is compatible with a wide array of functional groups. A new procedure for the synthesis of cyclopropanes by the formal cyclopropanation of carbonyl compounds and alkenes is described. This metal-free reaction proceeds through the base-promoted decomposition of tosylhydrazones. There is significant tolerance of the functional groups, enabling cyclopropanation in the presence of functionalities often not compatible with other methodologies.

3,6-Dimethoxyfluorenylidene: A Ground-State Singlet Carbene

Irradiation of 3,6-dimethoxy-9-diazofluorene gives 3,6-dimethoxy-9-fluorenylidene.This carbene was detected in frozen media by low-temperature optical spectroscopy and at room temperature in fluid solution by nanosecond laser techniques.The EPR spectrum o