105642-32-8

Basic information

• Product Name: 4H-1-Benzopyran-4-one, 5,7-bis(acetyloxy)-6,8-bis(diphenylmethyl)-2,3-dimethyl-
• CAS NO: 105642-32-8
• Molecular Formula: C41H34O6
• Molecular Weight: 622.717
• Mol File: 105642-32-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 4H-1-Benzopyran-4-one, 5,7-bis(acetyloxy)-6,8-bis(diphenylmethyl)-2,3-dimethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 4H-1-Benzopyran-4-one, 5,7-bis(acetyloxy)-6,8-bis(diphenylmethyl)-2,3-dimethyl-(105642-32-8)
• EPA Substance Registry System: 4H-1-Benzopyran-4-one, 5,7-bis(acetyloxy)-6,8-bis(diphenylmethyl)-2,3-dimethyl-(105642-32-8)

Safety Data

• Hazardous Substances Data: 105642-32-8(Hazardous Substances Data)

Upstream product

• 108-24-7 acetic anhydride 
• 105630-20-4 3,5-bisdiphenylmethyl-2,4,6-trihydroxypropiophenone 
• 91-01-0 1,1-Diphenylmethanol 
• 2295-58-1 flopropione 

Downstream Products

• 105630-24-8 6,8-bisdiphenylmethyl-5,7-dihydroxy-2,3-dimethylchromone 
• 105630-14-6 6,8-Dibenzhydryl-5,7-dimethoxy-2,3-dimethyl-chromen-4-one 
• 105630-25-9 6,8-Dibenzhydryl-5-hydroxy-7-methoxy-2,3-dimethyl-chromen-4-one 

Relevant articles and documents

Aromatic Benzhydrylation: Part VII - Synthesis of Benzhydrylated 2,4,6-Trihydroxypropiophenones and 5,7-Dihydroxy-2,3-dimethylchromones

2,4,6-Trihydroxypropiophenone (1) reacts with diphenylcarbinol in the presence of BF3.Et2O to give 3,5-bisdiphenylmethyl (2a) and 3-diphenylmethyl (3a) derivatives which on heating with acetic anhydride and sodium acetate followed by hydrolysis afford the corresponding 5,7-dihydroxychromones (4b and 5b respectively).In order to locate the position of diphenylmethyl group in 5b, 2,3-dimethyl-5,7-dihydroxychromone (6) has directly been benzhydrylated to give a mixture of 4b, 5b and its isomer 7b.Comparison of the chemical shifts for 5b and 7b and their acetates leads to the assigned structures.