Dimethylformamide → (1R,4aR)-1,4a-dimethyl-7-(propan-2-yl)-1,2,3,4,4a,4b,5,6,7,10a-decahydrophenanthrene-1-carbonyl chloride

HRID 1627239

Reaction equation

HRID 1627239 reaction equation
[CH3:1][CH:2]([CH:4]1[CH:9]=[C:8]2[CH2:10][CH2:11][CH:12]3[C:17]([C:19](O)=[O:20])([CH3:18])[CH2:16][CH2:15][CH2:14][C:13]3([CH3:22])[CH:7]2[CH2:6][CH2:5]1)[CH3:3].P(Cl)(Cl)[Cl:24].CN(C=O)C>C1COCC1>[CH3:18][C@:17]1([C:19]([Cl:24])=[O:20])[CH:12]2[C@@:13]([CH3:22])([CH:7]3[C:8]([CH:10]=[CH:11]2)=[CH:9][CH:4]([CH:2]([CH3:1])[CH3:3])[CH2:5][CH2:6]3)[CH2:14][CH2:15][CH2:16]1

Participants

5

Reactant 3

HCID 6228DimethylformamideHCID 24387Phosphorus trichlorideHCID 227277Dihydroabietic acid

Product 1

HCID 88415966(1R,4aR)-1,4a-dimethyl-7-(propan-2-yl)-1,2,3,4,4a,4b,5,6,7,10a-decahydrophenanthrene-1-carbonyl chlorideYield 93.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of dihydroabietic acid (1.0 eq. 9.95 mmol), phosphorous (III) chloride (1.1 eq. 10.95 mmol) and DMF (0.1 ml) is refluxed overnight in THF (20 ml). The reaction mass is filtered under suction and concentrated under vacuum to give 2.98 g (93%) yellow oil. The compound is used immediately for the next step without any purification.

Workup

  1. filtrationThe reaction mass is filtered under suction
  2. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-56121c6b026d4937a41bbe65d50eda61
Source dataset
uspto-grants-2014_07
Patent number
US08785502B2

Linked notes

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