Tag «cosy»

Continuous-Flow Preparation of γ-Butyrolactone Scaffolds, 2-(5,5-dimethyl-2-oxotetrahydrofuran-3- yl)acetic acid

It’s only fair to share… (5,5-dimethyl-2-oxotetrahydrofuran-3-yl)acetic acid 2-(5,5-Dimethyl-2-oxotetrahydrofuran-3-yl)acetic acid 2-carboxymethyl-4-methyl-4-pentanolide, Cas 412298-86-3       2-(5,5-Dimethyl-2-oxotetrahydrofuran-3-yl)acetic acid (4a). 1H NMR (DMSO-d6, 400 MHz): δ = 3.20 – 3.10 (m, 1H), 2.62 (dd, J = 17.1, 4.4 Hz, 1H), 2.54 – 2.45 (m, 1H), 2.31 – 2.21 (m, 1H), 1.84 (t, J = 12.0 Hz, 1H), 1.39 …

(7R, 8S, 8′S, 7″S, 8″R)-abiesol A 4″-O-β-d-glucopyranoside, capselloside.

It’s only fair to share… (7R, 8S, 8′S, 7″S, 8″R)-abiesol A 4″-O-β-d-glucopyranoside, and it was named capselloside. Capselloside (1): Brownish gum; [α]25D −34.0 (c = 0.05, MeOH); UV (MeOH) λmax (log ε) 280 (1.4), 228 (3.3), 214 (3.1) nm; IR (KBr) νmax 3261, 2946, 2816, 1638, 1489, 1261 cm−1; CD (MeOH) λmax (Δ ε) 291 (−), 280 (−) 257 (−) 230 (−) …