1165-60-2

Basic information

• Product Name: 2-Methyl-2-butenoic acid 9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester
• Synonyms: 2-Methyl-2-butenoic acid 9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester
• CAS NO: 1165-60-2
• Molecular Formula: C19H20O5
• Molecular Weight: 328.3591
• Mol File: 1165-60-2.mol
• Article Data: 2

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 2-Methyl-2-butenoic acid 9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Methyl-2-butenoic acid 9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester(1165-60-2)
• EPA Substance Registry System: 2-Methyl-2-butenoic acid 9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester(1165-60-2)

Safety Data

• Hazardous Substances Data: 1165-60-2(Hazardous Substances Data)

Upstream product

• 565-63-9 Angelic acid 
• 19380-05-3 (+)-lomatin 
• 94487-74-8 (Z)-2-methyl-2-butenoic anhydride 
• 35660-94-7 (Z)-2-methyl-2-butenoyl chloride 

Relevant articles and documents

The absolute configuration of angular 3′-acyloxypyranocoumarins by vibrational circular dichroism exciton chirality

A complex mixture of lomatin C-3′ esters and (-)-O-angeloyllomatin 1 was isolated from the seeds of Prionosciadium thapsoides. Since a literature search revealed that some lomatin C-3′ monoesters have positive specific rotations, while others had negative values, the absolute configuration of all of the molecules was determined to be (R) by exciton chirality in the infrared region, and by chemical correlation. A single crystal X-ray study of acetyllomatin 3, using the Flack and Hooft parameters, independently confirmed this absolute configuration.