(1R,3aS,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl trifluoromethanesulfonate → ethyl 3-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)bicyclo[3.1.0]hex-2-ene-6-carboxylate

HRID 1401032Notes

Reaction equation

HRID 1401032 reaction equation
FC(F)(F)S(O[C:7]1[C:8]([CH3:36])([CH3:35])[C@H:9]2[C@:22]([CH3:25])([CH2:23][CH:24]=1)[C@@H:21]1[C@:12]([CH3:34])([C@@:13]3([CH3:33])[C@H:18]([CH2:19][CH2:20]1)[C@H:17]1[C@H:26]([C:29]([CH3:31])=[CH2:30])[CH2:27][CH2:28][C@:16]1([NH2:32])[CH2:15][CH2:14]3)[CH2:11][CH2:10]2)(=O)=O.CC1(C)C(C)(C)OB([C:47]2[CH2:52][CH:51]3[CH:49]([CH:50]3[C:53]([O:55][CH2:56][CH3:57])=[O:54])[CH:48]=2)O1>>[NH2:32][C@:16]12[CH2:28][CH2:27][C@@H:26]([C:29]([CH3:31])=[CH2:30])[C@@H:17]1[C@@H:18]1[C@@:13]([CH3:33])([CH2:14][CH2:15]2)[C@@:12]2([CH3:34])[C@@H:21]([C@:22]3([CH3:25])[C@@H:9]([CH2:10][CH2:11]2)[C:8]([CH3:35])([CH3:36])[C:7]([C:47]2[CH2:52][CH:51]4[CH:49]([CH:50]4[C:53]([O:55][CH2:56][CH3:57])=[O:54])[CH:48]=2)=[CH:24][CH2:23]3)[CH2:20][CH2:19]1

Participants

3

Reactant 2

HCID 71698571(1R,3aS,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl trifluoromethanesulfonateHCID 86692388Ethyl 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)bicyclo[3.1.0]hex-2-ene-6-carboxylate

Product 1

HCID 86692392ethyl 3-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)bicyclo[3.1.0]hex-2-ene-6-carboxylateYield 86.6%

Procedure

The titled compound was prepared in 86.6% yield following the method described in step 1 for the preparation of Example 1 described above, using (1R,3aS,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl trifluoromethanesulfonate and ethyl 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)bicyclo[3.1.0]hex-2-ene-6-carboxylate as the reactants. MS: m/e 543.5 (M−16)+, 2.87 min. 1H NMR (400 MHz, CHLOROFORM-d) δ 5.84-5.72 (m, 1H), 5.47-5.32 (m, 1H), 4.72 (s, 1H), 4.59 (s, 1H), 4.24-3.99 (m, 2H), 3.09-2.74 (m, 1H), 2.67-2.40 (m, 3H), 2.26-2.10 (m, 1H), 2.09-1.92 (m, 3H), 1.69 (s, 3H), 1.67-1.65 (m, 1H), 1.64-1.31 (m, 9H), 1.29-1.22 (m, 5H), 1.17-1.05 (m, 4H), 1.02 (s, 6H), 0.98-0.93 (m, 7H), 0.82 (m, 3H).

Workup

  1. customdescribed in step 1 for the preparation of Example 1
  2. customm/e 543.5 (M−16)+, 2.87 min

Sources & evidence

ORD record
ord-449032ec1eca4fddb368a0dce4113c84
Source dataset
uspto-grants-2014_12
Patent number
US08906889B2

Reaction notes

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