263351-94-6

Basic information

• Product Name: (10R,11S)-10,11-dihydro-4-propyl-6,6,10,11-tetramethyl-2H,6H,12H-benzo[1,2-b;3,4-b';5,6-b'']tripyran-2,12-dione
• CAS NO: 263351-94-6
• Molecular Weight: 368.43
• Mol File: 263351-94-6.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: (10R,11S)-10,11-dihydro-4-propyl-6,6,10,11-tetramethyl-2H,6H,12H-benzo[1,2-b;3,4-b';5,6-b'']tripyran-2,12-dione(CAS DataBase Reference)
• NIST Chemistry Reference: (10R,11S)-10,11-dihydro-4-propyl-6,6,10,11-tetramethyl-2H,6H,12H-benzo[1,2-b;3,4-b';5,6-b'']tripyran-2,12-dione(263351-94-6)
• EPA Substance Registry System: (10R,11S)-10,11-dihydro-4-propyl-6,6,10,11-tetramethyl-2H,6H,12H-benzo[1,2-b;3,4-b';5,6-b'']tripyran-2,12-dione(263351-94-6)

Safety Data

• Hazardous Substances Data: 263351-94-6(Hazardous Substances Data)

Upstream product

• 185339-28-0 5-Hydroxy-6-((2R,3R)-3-hydroxy-2-methyl-butyryl)-2,2-dimethyl-10-propyl-2H-pyrano[2,3-f]chromen-8-one 
• 107-86-8 3,3-dimethyl acrylaldehyde 
• 685844-44-4 5-hydroxy-8,9-dimethyl-4-propyl-8,9-dihydro-pyrano[2,3-f]chromene-2,10-dione 
• 150935-56-1 5,7-dihydroxy-8-(2-methyl-2-buten-1-onyl)-4-propyl-2H-1-benzopyran-2-one 
• 738600-86-7 C₂₂H₂₆O₆ 
• 166983-61-5 HI-D₁₂ 
• 334881-61-7 (8R,9S)-8,9-dihydro-8,9-dimethyl-5-methoxy-4-propyl-2H,10H-benzo[1,2-b;5,6-b']dipyran-2,10-dione 
• 172805-19-5 5-Hydroxy-2,2-dimethyl-6-<(E)-2-methylbut-2-enoyl>-10-propyl-2H,8H-benzo<1,2-b:3,4-b'>dipyran-8-one 

Downstream Products

• 161753-49-7 (+/-)-12-oxocalanolide A 
• 183904-55-4 HI-D₈₆ 
• 183904-54-3 (10S,11S)-10,11-dihydro-4-propyl-6,6,10,11-tetramethyl-2H,6H,12H-benzo[1,2-b;3,4-b';5,6-b'']tripyran-2,12-dione 
• 142632-32-4 (+)-calanolide A 

Relevant articles and documents

Concise Synthesis of Anti-HIV-1 Active (+)-Inophyllum B and (+)-Calanolide A by Application of (-)-Quinine-Catalyzed Intramolecular Oxo-Michael Addition

(-)-Quinine-catalyzed intramolecular oxo-Michael addition (IMA) of 7-hydroxy-5-methoxy-8-tigloylcoumarins was developed for the enantioselective construction of 2,3-dimethyl-4-chromanone systems in the context of the asymmetric synthesis of anti-HIV-1 act

PROCESSES FOR PREPARING CALANOLIDE A AND INTERMEDIATES THEREOF

The present invention provides a production method of Calanolide A according to the following method wherein each symbol is as defined in the specification, as a more convenient and industrially practical method for the synthesis of Calanolide A from an easily available starting material.

Synthesis of (+)-calanolide A, an anti-HIV agent, via enzyme-catalyzed resolution of the aldol products

The synthesis of (+)-calanolide A (1), an anti-HIV-1 agent, is described. A TiCl4-mediated aldol reaction of compound 2 stereoselectively produced the desired syn diastereomer (±)-5, which was resolved by a lipase-catalyzed acylation reaction. Under Mitsunobu conditions (Ph3P/DEAD), the syn aldol product (+)-5 led to the formation of trans-2,3-dimethyl chroman-4-one [(+)-3] with 94% ee, while the anti aldol product (+)-6 yielded both trans and cis derivatives (+)-3 and (+)-4 with 60% and 68% ee, respectively. Luche reduction on (+)-3 led to (+)-1 and (+)-calanolide B in a ratio of 9:1. Copyright (C) Elsevier Science Ltd.