Methanol → 2-(3,4-Dihydroxyphenyl)-3,5,7-trihydroxy-6-(3-methyl-2-buten-1-yl)-4H-1-benzopyran-4-one

Participants

Role	Name	HCID	Charge
Reactant	Methanol	HCID 887	—
Reactant	Isolicoflavonol	HCID 5318585	—
Reactant	Albanol A	HCID 44567218	—
Product	2-(3,4-Dihydroxyphenyl)-3,5,7-trihydroxy-6-(3-methyl-2-buten-1-yl)-4H-1-benzopyran-4-one	HCID 5481966	—

Reaction Steps

Yellow powder; UV (MeOH) λmax (log ε) 261 (4.13), 205 (4.79) nm; 1H NMR (CD3COCD3, 500 MHz) δ 1.66 (3H, s, H-5′), 1.82 (3H, s, H-4′), 3.56 (2H, d, J=6.0 Hz, H-1′), 5.29 (1H, m, H-2′), 6.36 (1H, s, H-8), 7.00 (1H, d, J=8.3 Hz, H-5′), 7.72 (1H, brd, J=7.4 Hz, H-6′), 7.87 (1H, s, H-2′); EIMS m/z 370 (M+, 100), 355 (94), 315 (45), 302 (37), 244 (12), 137 (21).

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US06737439B2
Source dataset	uspto-grants-2004_05
ORD ID	ord-b128c2a8195d4663b463235d84746783
Source note	uspto-grants-2004_05