164656-22-8

Basic information

• Product Name: Dihydrodutasteride
• Synonyms: (4aR,4bS,6aS,7S,9aS,9bS,11aR)-N-[2,5-Bis(trifluoroMethyl)phenyl]hexadecahydro-4a,6a-diMethyl-2-oxo-1H-Indeno[5,4-f]quinoline-7-carboxaMide;(5α,17β)-N-[2,5-Bis (trifluoroMethyl)phenyl]-3-oxo-4-azaandrostane-17-carboxaMide;Dihydro Dutasteride;Dihydrodutasteride
• CAS NO: 164656-22-8
• Molecular Formula: C₂₇H₃₂F₆N₂O₂
• Molecular Weight: 530.5455992
• Mol File: 164656-22-8.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 613.8±55.0 °C(Predicted)
• Appearance: /
• Density: 1.286±0.06 g/cm3(Predicted)
• Storage Temp.: Refrigerator
• Solubility: DMSO (Slightly), Methanol (Slightly)
• PKA: 13.33±0.70(Predicted)
• CAS DataBase Reference: Dihydrodutasteride(CAS DataBase Reference)
• NIST Chemistry Reference: Dihydrodutasteride(164656-22-8)
• EPA Substance Registry System: Dihydrodutasteride(164656-22-8)

Safety Data

• Hazardous Substances Data: 164656-22-8(Hazardous Substances Data)

Usage

Uses

Dihydro Dutasteride is an impurity arose during the process development of Dutasteride (D735000).

Upstream product

• 328-93-8 2,5-bis(trifluoromethyl)aniline 
• 103335-55-3 3-oxo-4-aza-5α-androstane-17β-carboxylic acid 
• 73671-92-8 3-oxo-4-aza-5α-androstane-17β-carboxylic acid methyl ester 
• 73711-89-4 3,20-dioxo-4-aza-5α-pregnane 
• 1416955-23-1 C₂₀H₃₁NO₃ 
• 20283-95-8 3,20-dioxo-4-aza-pregnan-5-ene 

Downstream Products

• 1796930-46-5 dutasteride 

Relevant articles and documents

Synthesis and comprehensive structural and physicochemical characterization of dutasteride hydrochloride hydrate solvates

Four crystalline dutasteride hydrochloride hydrate solvates containing respectively methanol, ethanol, acetone and acetonitrile molecules were obtained. All samples were characterized by extensive spectroscopic analysis with infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC) and 1H as well as 13C NMR techniques. For three solvates, i.e. methanol, ethanol and acetone solvates, the single crystal X-ray diffraction (SCXRD) experiments were possible, and their respective crystal and molecular structures were determined. The present study allowed to unambiguously establish the molecular composition of solvates as consisting of a dutasteride: hydrogen chloride: water: solvent in a molar ratio of 1:1:1:1 and confirm that they are isostructural. Beyond providing the full spectroscopic characteristic of the compounds, the results obtained have also allowed clarifying of some appearing inconsistencies in published literature regarding the appropriate attribution of IR absorption bands to the relevant molecular vibrations.

PROCESS FOR THE SYNTHESIS OF (5α,17β)-N-[(2,5-BIS(TRIFLUOROMETHYL)-PHENYL]-3-OXO-4-AZA-5-ANDROST-1-ENE-17-CARBOXAMIDE

The synthesis consists of reaction steps as follows: oxidizing the α,β-unsaturated ketone system of ring "A" of pregn-4-ene-3,20-dion- of formula (II) with sodium metaperiodate in tert-butanol in the presence of potassium permanganate and alkali metal carbonate, reacting the obtained 3,5-seco acid with an ester of chloroformic acid in the presence of tertier organic base below 0°C, reacting the obtained new compound after isolation or without isolation with ammonia or ammonium acetate, cyclization of the resulting carboxamides with an acid, cathalytic hydrogenating the obtained ene lactame, and oxidizing the side chain at position 17 of the obtained pregnane compound with an alkali metal hypobromide in aqueous dioxane below 10°C. Thereafter on one hand the obtained (5α,17β)-3-oxo-4-aza-5-androstane-17-carboxylic acid is reacted with chloroformic acid ester, the obtained new compound is reacted with 2,5-bis(trifluoromethyl)-aniline in the presence of a Lewis acid, the obtained amide is reacted with trimethyl chlorosilane in inert atmosphere in the presence of Ν,Ν,Ν',Ν'-tetramethyl-ethylendiamine, then en excess iodine is added to the reaction mixture and the product of the iodination reaction is crystallized from acetonitrile, then the obtained 2-iodo-3-oxo-4-aza-17β-carboxamide is reacted with potassium tert-butylate to furnish final product. On the other hand, (5α,17β)-3-oxo-4-aza-5-androstane-17-carboxylic acid is transformed into methylester by known method, this latter is transformed into methyl (2α,5α,17β)-2-iodo-3-oxo-4-aza-5-androstane-17-carboxylate according to known method, the obtained compound is reacted with potassium-tert-butylate, the obtained (5α,17β)-3-oxo-4-aza-5-androst-1-ene-17-carboxylic acid is reacted with an ester of chloroformic acid, then the obtained new compound is coupled with 2,5-bis(trifluoromethyl)-aniline in the presence of a Lewis acid catalyst to gain final product.