- A new synthetic approach to prostaglandin analogues: Synthesis of bimatoprost via lipase enzymatic catalysis
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A simple, convenient and efficient synthetic approach for the synthesis of (15S) bimatoprost (4) via lipase enzyme mediated stereo selective reduction from chiral precursor Corey lactone diol as substrate was described. Swern oxidation, lipase enzymatic reduction and Wittig reaction conditions are used as key steps for the synthesis of bimatoprost. This method was found to be an efficient with considerable yield, cost effective and minimized the synthetic steps compared to reported procedures.
- Kamidi, Vijendhar,Kale, Pooja,Boodida, Sathyanarayana
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p. 2767 - 2770
(2017/11/10)
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- PROCESS FOR THE PREPARATION OF BIMATOPROST
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It is provided a process for the preparation of bimatoprost, which comprises: a) reacting a compound of formula (III) with ethylamine in the presence of a suitable solvent; and b) deprotecting compound obtained in step a) to obtain bimatoprost, wherein R1 is selected from (C1-C16)alkyl, (C1C16)haloalkyl, (C2-C16)alkenyl, (C2-C16)haloalkenyl, (C1-C16)alkoxy(C1-C16)alkyl, aryl, (C1-C16)alkylaryl, allyl, - (CH2-CH2-O)n-CH3 wherein n = 1, 2, 3 or 4, and -CH(O-CH2-CH2)2; R2 is selected from H, (C1-C16)alkyl, (C1-C16)haloalkyl, (C2-C16)alkenyl, (C2- C16)haloalkenyl, (C1-C16)alkoxy(CrC16)alkyl, aryl, (C1-C16)alkylaryl, allyl; or, alternatively, R1 and R2 taken together are selected from -CH2-CH2-CH2-, -CH2-CH2-, -O-CH2-CH2-, and -O-CH=CH-. There are also provided intermediates useful in such preparation process.
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Page/Page column 29; 30
(2017/11/15)
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- Processes for the preparation of isomer free prostaglandins
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Novel processes for the preparation of a compound of Formula I-2 substantially free of the 5,6-trans isomer: wherein R2, R3 and R4 are as defined in the specification are provided. Novel intermediates for the preparations of isomer free Prostaglandins and derivatives thereof are also provided.
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- PROCESSES AND INTERMEDIATES FOR THE PREPARATIONS OF ISOMER FREE PROSTAGLANDINS
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Novel processes for the preparation of a compound of Formula I-2 substantially free of the 5,6-trans isomer: wherein R2, R3 and R4 are as defined in the specification are provided. Novel intermediates for the preparations of isomer free Prostaglandins and derivatives thereof are also provided.
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- PROCESS FOR PREPARING PROSTAGLANDIN DERIVATIVES
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The present invention relates to a process for preparing a prostaglandin derivative and an intermediate therefor. In accordance with the present invention, the prostaglandin F (PGF) derivative can be efficiently prepared with high purity by removing the protecting group of a protected prostaglandin E (PGE) derivative obtained from conjugate addition and then stereoselectively reducing the ketone group on the cyclopentanone ring of the PGE derivative.
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Paragraph 102-104
(2010/10/03)
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- Method for preparing prostaglandin F analogue
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A method for preparing a prostaglandin F analogue represented by the following formula (I) is disclosed, wherein R1, and are as defined in the specification.
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Page/Page column 13-14
(2009/10/21)
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- Bimatoprost crystalline form I
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The invention provides a novel polymorphic form I of crystalline bimatoprost, method for preparation thereof and new crystalline intermediates in the preparation. This form I of crystalline bimatoprost is used in purification of crude bimatoprost and in storage of bimatoprost as active pharmaceutical intermediate. Use of the physical form of bimatoprost in the manufacture of a medicament is also disclosed.
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Page/Page column 16
(2009/07/10)
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- Improved process for the production of bimatoprost
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The present invention relates to a process for the purification of crude bimatoprost to obtain pure bimatoprost comprising a chromatography, preferably a chromatography using an achiral stationary phase and an eluent comprising an alcohol and an apolar solvent; and crystallisation of the product obtained the chromatography to obtain pure bimatoprost.
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Page/Page column 15
(2009/12/28)
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- PROSTAGLANDIN SYNTHESIS
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A process for the preparation of prostaglandin compounds having the formula (I); wherein A is selected from the group consisting Of C1-C6 alkyl; C7-C16 aralkyl wherein the aryl group is optionally substituted with one to three substituents selected from the group consisting Of C1 -C6 alkyl, halo and CF3; and (CH2)nOR' wherein n is from 1 to 3 and R' represents a C6-Cl0 aryl group which is optionally substituted with one to three substituents selected from the group consisting Of C1-C6 alkyl, halo and CF3; B is selected from OR" and NHR" wherein R" is C1-C6 alkyl; and formula (a) represents a double bond or a single bond, is disclosed. Novel intermediates are also disclosed.
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Page/Page column 46
(2008/06/13)
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- Design and synthesis of 13,14-dihydro prostaglandin F(1α) analogues as potent and selective ligands for the human FP receptor
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The in vitro evaluation of a new class of potential bone anabolic agents for the treatment of osteoporosis is described. These compounds are potent and selective ligands for the human prostaglandin F receptor (hFP receptor). The compounds lack the olefin unsaturation required for potency in the natural ligand PGF(2α) yet retain binding affinity for the hFP receptor in the nanomolar to micromolar range. Removal of the alkenes also results in a better selectivity ratio for the hFP receptor over the other prostaglandin receptors tested. A rationale for the selectivity differences of various analogues, based on ligand docking experiments to a putative hFP receptor model, is also described.
- Wang, Yili,Wos, John A.,Dirr, Michelle J.,Soper, David L.,DeLong, Mitchell A.,Mieling, Glen E.,De, Biswanath,Amburgey, Jack S.,Suchanek, Eric G.,Taylor, Cynthia J.
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p. 945 - 952
(2007/10/03)
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