110716-87-5

Upstream product

• 73407-88-2 (3aα,4β,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-Octahydro-8-hydroxy-4a,8-dimethyl-4-<(tetrahydro-2H-pyran-2-yl)oxy>-azyleno<6,5-b>furan-2(3H)-one 
• 73407-84-8 (3aS,4aR,5R,7aS,8S,9aR)-5-Benzyloxy-4a,8-dimethyl-3,3a,4a,5,7a,8,9,9a-octahydro-azuleno[6,5-b]furan-2,4-dione 
• 68257-98-7 (3aα,4α,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-Octahydro-4,5-dihydroxy-4a,8-dimethylazuleno<6,5-b>furan-2(3H)-one 
• 73407-89-3 (3aα,4α,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-Octahydro-4,5-dihydroxy-3-methylene-4a,8-dimethylazuleno<6,5-b>-furan-2(3H)-one 
• 68241-56-5 (3aα,4α,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-Octahydro-4a,8-dimethyl-4,5-bis<(tetrahydro-2H-pyran-2-yl)oxy>azuleno<5,6-b>furan-2(3H)-one 
• 68241-57-6 (3aα,4α,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-Octahydro-4,5-dihydroxy-3-methylene-4a,8-dimethylazuleno<6,5-b>-furan-2(3H)-one 
• 73407-89-3 (3aα,4β,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-octahydro-4a,8-dimethyl-3-methylene-4,5-bis<(tetrahydro-2H-pyran-2-yl)oxy>-azuleno<6.5-b>furan-2(3H)-one 
• 68241-56-5 (3aR,4R,4aS,5S,7aR,8R,9aS)-4a,8-Dimethyl-4,5-bis-(tetrahydro-pyran-2-yloxy)-3a,4,4a,5,7a,8,9,9a-octahydro-3H-azuleno[6,5-b]furan-2-one 
• 71686-37-8 (3aα,4α,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-Octahydro-4-hydroxy-4a,8-dimethyl-5-(phenylmethoxy)azuleno<6,5-b>-furan-2(3H)-one 
• 71686-37-8 (3aα,4β,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-Octahydro-4-hydroxy-4a,8-dimethyl-5-(phenylmethoxy)azuleno<6,5-b>-furan-2(3H)-one 
• 73407-87-1 (3aR,4R,4aS,5S,7aR,8R,9aS)-5-Benzyloxy-4a,8-dimethyl-4-(tetrahydro-pyran-2-yloxy)-3a,4,4a,5,7a,8,9,9a-octahydro-3H-azuleno[6,5-b]furan-2-one 
• 68241-57-6 (3aα,4β,4aβ,5β,7aα,8α,9aβ)-3a,4,4a,5,7a,8,9,9a-Octahydro-4,5-dihydroxy-3-methylene-4a,8-dimethylazuleno<6,5-b>-furan-2(3H)-one 

Downstream Products

• 3668-14-2 dl-Linifolin A 

Relevant academic research and scientific papers

Helenanolides: Stereocontrolled Total Synthesis of dl-Bigelovin, dl-Mexicanin I, and dl-Linifolin A

Stereocontrolled total syntheses of the sesquiterpene lactones dl-bigelovin (11), dl-mexicanin I (12), and dl-linifolin A (13) are described.The syntheses start with the hydroazulenone 4 and proceed via the key epoxy alkohol 9.Elaboration of 9 into the tricyclic γ-lactone 14 dl-bigelovin. α-methylenation.Subsequent oxidation at C(4) completes the synthesis of dl-bigelovin.Epoxide opening of 9 with dilithioacetate provides access to tricyclic lactone 23 which gives way to 24 via reduction of ketone 25.Cleavage of the benzyl ether in 24 followed by α-methylenationand oxidation generates dl-mexicanin I.Acetylation of 12 affords dl-linifolin A.