99755-59-6 Usage
Description
Different sources of media describe the Description of 99755-59-6 differently. You can refer to the following data:
1. While levodopa is still considered the cornerstone of treatment of Parkinson’s
disease, many patients begin to experience treatment-related problems, such as a
wearing-off phenomenon and the development of dyskinesias as the disease
progresses. Continuous dopaminergic stimulation by means of a dopamine
agonist has been recognized as being associated with a lower incidence of
dyskinesias. Using a selective dopamine agonist as monotherapy in early disease
may delay the onset of levodopa therapy, or at a minimum, lower its dose in
adjunctive situations to minimize the adverse neurotoxic effects of levodopa.
Rotigotine is a nonergolinic dopamine D3/D2/D1 receptor agonist, and it is the
first dopamine agonist to be launched as a transdermal patch.
2. Rotigotine is a non-selective dopamine receptor agonist with pEC50 values of 9.6, 10.4, 8.2, 7.7, and 7.7 for D1, D2, D3, D4, and D5, respectively. It demonstrates a high-affinity for D1, D2, and D3 with lesser affinity for D4 and D5 receptor subtypes. This binding profile is similar to that of apomorphine and pergolide but differentiated from that of pramipexole and ropinirole, which have a more narrow profile of receptor specificity. Each of these agonists demonstrates anti-Parkinsonian effects in animal and clinical models through their ability to directly activate dopamine receptors.
Originator
Aderis (US)
Uses
It is a non-ergot dopamine agonist drug and is indicated for the treatment of Parkinson disease.
Brand name
Neupro
General Description
Rotigotine, (6S)-6-{propyl[2-(2-thienyl)ethyl]amino}-5,6,7,8-tetrahydro-1-naphthalenol (Neupro),is a nonergoline that is available as a silicone-based, selfadhesivematrix, transdermal system for continuous delivery over a 24-hour period. Approximately 45% of the drug is releasedwithin 24 hours. The terminal half-life of rotigotine is5 to 7 hours after removal of the patch. Rotigotine is 90%bound to plasma proteins. The compound undergoes extensivemetabolism and has low bioavailability by the oralroute. The major metabolites of rotigotine are the glucuronideand sulfate conjugates of rotigotine and sulfateconjugates of N-despropylrotigotine and N-desthienylethylrotigotine. Rotigotine is excreted in the urine (71%) andfeces (11%).Studies using human liver microsomes didnot find any interactions with CYP1A2, CYP2C9,CYP2C19, CYP2D6, and CYP3A4 substrates.Rotigotinetransdermal system contains sodium metabisulfite, and individualssensitive to sulfite could be at risk for allergic reactions.Additionally, somnolence is a common adverse reactionwith individuals on rotigotine, and patients should beclosely monitored during therapy.In transfected Chinesehamster ovary (CHO) cells, rotigotine binds with high affinityat D3 and D2L receptors (variants in the D2 receptor subtypeare caused by insertion of the 29 amino acids into thethird loop to give D2s and D2L).Using rat CHO cells,rotigotine shows over 30-fold selectivity at D3 versus D2 receptors.48 Rotigotine was approved in May 2007 for thetreatment of early-stage PD.
Clinical Use
Treatment of Parkinson’s disease
Restless legs syndrome (RLS)
Synthesis
The synthesis described by the originators at Discovery
Therapeutics Inc. (now known as Aderis Pharmaceuticals)
is shown in the scheme. The synthesis utilizes the
chiral methoxy tetralin 62 as starting precursor which was
obtained via chiral crystallization procedure described in a
patent literature [34]. Demethylation of tetraline 62 with
refluxing 40% HBr solution for several hours provided phenol
63 in 96% yield. Reaction of the amine 63 with 2-
thiophenylethyl tosylate 64 in refluxing xylene for 24-32 h in
the presence of 0.6 equiv sodium carbonate gave the desired
rotigotine (IX) without requiring chromatographic purification.
The ratio of sodium carbonate to the amine was critical
to achieving good yields (59-84% yield) without requiring
extensive purification. Rotigotine was isolated as the HCl
salt.
Drug interactions
Potentially hazardous interactions with other drugs
Antipsychotics: avoid concomitant use (antagonism
of effect).
Metoclopramide: avoid concomitant use (antagonism
of effect).
Metabolism
Rotigotine is metabolised in the gut wall and liver
by N-dealkylation as well as direct and secondary
conjugation. Main metabolites are sulfates and
glucuronide conjugates of the parent compound as well as
N-desalkyl-metabolites, which are biologically inactive.
Approximately 71% of the rotigotine dose is excreted
in urine and a smaller part of about 23% is excreted in
faeces.
Check Digit Verification of cas no
The CAS Registry Mumber 99755-59-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,7,5 and 5 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 99755-59:
(7*9)+(6*9)+(5*7)+(4*5)+(3*5)+(2*5)+(1*9)=206
206 % 10 = 6
So 99755-59-6 is a valid CAS Registry Number.
InChI:InChI=1/C19H25NOS/c1-2-11-20(12-10-17-6-4-13-22-17)16-8-9-18-15(14-16)5-3-7-19(18)21/h3-7,13,16,21H,2,8-12,14H2,1H3/t16-/m0/s1
99755-59-6Relevant articles and documents
Preparation method of rotigotine
-
, (2021/08/11)
The invention relates to the technical field of medicine preparation, and discloses a preparation method of rotigotine, which comprises the following steps: by taking 5-methoxy-2-tetralone as an initial raw material, reacting with R-alpha-methylbenzylamine, performing debenzylation reduction and S-mandelic acid chiral resolution, then reacting with a propionyl chloride reagent to generate an amide compound, and then reducing by a sodium borohydride reagent to obtain the rotigotine; and finally, reacting with 2-(thiophene-2-yl) 2-nitric acid benzene sulfonic acid ethyl ester to obtain the rotigotine. The preparation process route is as follows: the rotigotine is mild in preparation condition, simple and convenient to operate, relatively high in yield of key intermediates, high in optical purity and easy for industrial large-scale production, and has a very good application prospect.
Preparation method for rotigotine
-
, (2019/04/17)
The invention discloses a preparation method for rotigotine. The preparation method includes the following steps: S1. performing an amination reduction reaction on a 5-methoxy-2-tetralone solution, tert-butanesulfinamide, a catalyst, and sodium borohydride to obtain a substance A; S2. performing an alkylation reaction on a solution of the substance A, bromopropane, and a basic catalyst to obtain asubstance B; S3. reacting the substance B with a hydrochloric acid methanol solution to obtain a substance C; S4. performing a reaction on the substance C, 2-(2-bromoethyl)thiophene, potassium carbonate, and N,N-dimethylformamide to obtain a substance D; and S5. reacting acetic acid with hydrogen bromide to obtain the rotigotine. The preparation method is simple in operation, is high in yield, ismild in reaction condition, is green and environmentally friendly, is high in purity of the prepared rotigotine, and is suitable for large-scale industrial production.
Enantioselective Synthesis of β-Aminotetralins via Chiral Phosphoric Acid-catalyzed Reductive Amination of β-Tetralones
Park, Do Young,Kim, Kyung-Hee,Cheon, Cheol-Hong
supporting information, p. 462 - 467 (2017/12/07)
A new protocol for the synthesis of chiral β-aminotetralins has been developed via chiral phosphoric acid-catalyzed asymmetric reductive amination of β-tetralones using a Hantzsch ester as an organic hydride donor. Various chiral β-aminotetralins were obtained in good yields with good to high enantioselectivities. Furthermore, the utility of our new protocol was successfully demonstrated in the enantioselective synthesis of rotigotine. (Figure presented.).
