Potassium Carbonate → (6R,6aS,14aR)-methyl 6,8,14a-trihydroxy-11-((2S,3R,4R,5R,6S)-4-hydroxy-3,5-dimethoxy-6-methyltetrahydro-2H-pyran-2-ylamino)-6a-methoxy-3-methyl-7,9,12,14-tetraoxo-1-(pyridin-3-ylmethoxy)-5,6,6a,7,9,12,14,14a-octahydrobenzo[a]tetracene-2-carboxylate hydrochloride

HRID 406138Notes

Reaction equation

[OH:1][C:2]1[C:7]2[C@@:8]3([OH:45])[C@@:21]([O:25][CH3:26])([C@H:22]([OH:24])[CH2:23][C:6]=2[CH:5]=[C:4]([CH3:46])[C:3]=1[C:47]([O:49][CH3:50])=[O:48])[C:20](=[O:27])[C:19]1[C:10](=[CH:11][C:12]2[C:13](=[O:43])[C:14]([NH:30][C@@H:31]4[C@H:36]([O:37][CH3:38])[C@H:35]([OH:39])[C@@H:34]([O:40][CH3:41])[C@H:33]([CH3:42])[O:32]4)=[CH:15][C:16](=[O:29])[C:17]=2[C:18]=1[OH:28])[C:9]3=[O:44].C(=O)([O-])[O-].[K+].[K+].Cl.[N:58]1[CH:63]=[CH:62][CH:61]=[C:60]([CH2:64][Cl:65])[CH:59]=1>>[ClH:65].[OH:24][C@H:22]1[C@:21]2([O:25][CH3:26])[C@@:8]([OH:45])([C:9](=[O:44])[C:10]3[C:19]([C:20]2=[O:27])=[C:18]([OH:28])[C:17]2[C:16](=[O:29])[CH:15]=[C:14]([NH:30][C@@H:31]4[C@H:36]([O:37][CH3:38])[C@H:35]([OH:39])[C@@H:34]([O:40][CH3:41])[C@H:33]([CH3:42])[O:32]4)[C:13](=[O:43])[C:12]=2[CH:11]=3)[C:7]2[C:2]([O:1][CH2:64][C:60]3[CH:59]=[N:58][CH:63]=[CH:62][CH:61]=3)=[C:3]([C:47]([O:49][CH3:50])=[O:48])[C:4]([CH3:46])=[CH:5][C:6]=2[CH2:23]1

Participants

Reactant 3

HCID 11430Potassium Carbonate

HCID 233943-(Chloromethyl)pyridine hydrochloride

HCID 67121454(6R,6aS,14aR)-methyl 1,6,8,14a-tetrahydroxy-11-((2S,3R,4R,5R,6S)-4-hydroxy-3,5-dimethoxy-6-methyltetrahydro-2H-pyran-2-ylamino)-6a-methoxy-3-methyl-7,9,12,14-tetraoxo-5,6,6a,7,9,12,14,14a-octahydrobenzo[a]tetracene-2-carboxylate

Product 1

HCID 67121457(6R,6aS,14aR)-methyl 6,8,14a-trihydroxy-11-((2S,3R,4R,5R,6S)-4-hydroxy-3,5-dimethoxy-6-methyltetrahydro-2H-pyran-2-ylamino)-6a-methoxy-3-methyl-7,9,12,14-tetraoxo-1-(pyridin-3-ylmethoxy)-5,6,6a,7,9,12,14,14a-octahydrobenzo[a]tetracene-2-carboxylate hydrochlorideYield 31.5%

Procedure

Following General Procedure: Method B using (6R,6aS,14aR)-methyl 1,6,8,14a-tetrahydroxy-11-((2S,3R,4R,5R,6S)-4-hydroxy-3,5-dimethoxy-6-methyltetrahydro-2H-pyran-2-ylamino)-6a-methoxy-3-methyl-7,9,12,14-tetraoxo-5,6,6a,7,9,12,14,14a-octahydrobenzo[a]tetracene-2-carboxylate (35 mg, 0.050 mmol), potassium carbonate (21 mg, 0.15 mmol) and 3-picolyl chloride hydrochloride (25 mg, 0.15 mmol), the product was purified by preparative TLC (silica gel, 95:5 dichloromethane/methanol) and converted to hydrochloride to afford (6R,6aS,14aR)-methyl 6,8,14a-trihydroxy-11-((2S,3R,4R,5R,6S)-4-hydroxy-3,5-dimethoxy-6-methyltetrahydro-2H-pyran-2-ylamino)-6a-methoxy-3-methyl-7,9,12,14-tetraoxo-1-(pyridin-3-ylmethoxy)-5,6,6a,7,9,12,14,14a-octahydrobenzo[a]tetracene-2-carboxylate hydrochloride (13 mg, 31%) as an orange-red solid: 1H NMR (500 MHz, CDCl3) δ 14.21 (s, 1H), 8.79 (br s, 2H), 8.26 (d, J=4.1 Hz, 1H), 7.87 (br s, 1H), 7.41 (s, 1H), 6.92 (s, 1H), 6.89 (br s, 1H), 5.85 (s, 1H), 5.12 (d, J=11.2 Hz, 1H), 5.05 (d, J=11.3 Hz, 1H), 4.98 (br s, 1H), 4.66 (br s, 1H), 4.39 (br s, 1H), 3.85 (s, 3H), 3.81-3.74 (m, 1H), 3.72 (s, 3H), 3.65 (dd, J=19.3, 7.3 Hz, 1H), 3.60 (s, 3H), 3.43 (s, 1H), 3.40 (s, 3H), 3.36-3.31 (m, 1H), 3.14 (t, J=9.0 Hz, 1H), 2.51 (br s, 1H), 2.24 (s, 3H), 1.36 (d, J=6.1 Hz, 3H); MS (ESI+) m/z 789 (M+H); HPLC >99% (AUC), tR 12.34 min.

Workup

customthe product was purified by preparative TLC (silica gel, 95:5 dichloromethane/methanol)

Sources & evidence

ORD record: ord-d658d88b910845d28e2e246c5589eabc
Source dataset: uspto-grants-2014_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08754054B2

Reaction notes

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