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Unusual Course of the Reaction of Lawesson’s Reagent with β - Phosphoryl -β’ - carbethoxyhydrazones : First Synthesis of 5- Mercapto- 3- (methylthio-phosphoryl)pyrazoles
Emna Chebil and Soufiane Touil
[Abstract] [FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00067]
A Convenient Method for the Preparation of 2,4,5- triaryl Imidazoles Using Barium Chloride Dispersed on Silica Gel Nanoparticles (BaCl 2-nano SiO2) as Heterogeneous Reusable Catalyst
Mohammad R.M. Shafiee, Abbas Fazlinia, Najme Yaghooti and Majid Ghashang
[Abstract] [FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00068]
An Efficient Synthetic Method for Phenylalanine Containing Crown Ether Ring
Xia Tian, Fang Li, Jianrong Han, Xiaoli Zhen and Shouxin Liu
[Abstract] [FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00069]
New Route for the Synthesis of Chiral Hydrazine SADP
Tao Jia
[Abstract] [FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00070]
Synthesis of (+) - (4 S ,5 S ) - Muricatacin via Pd- Catalyzed Stereospecific Hydroxy Substitution Reaction of γ , δ - epoxy α , β - Unsaturated Ester with B(OH)3
Gowravaram Sabitha, G. Chandrashekhar, D. Vasudeva Reddy and J.S. Yadav
[Abstract] [FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00071]
Comparative Study for the Aqeous Synthesis of New Generation of Diindolylmethanes Using L- Proline, K10 and Nano- Fe3 O4 under Ultrasound Irradiation
Mohammad Nikpassand, Leila Zare and Mohammad R. Mousavi
[Abstract] [FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00072]
Abstracts
Unusual Course of the Reaction of Lawesson’s Reagent with β - Phosphoryl -β’ - carbethoxyhydrazones : First Synthesis of 5- Mercapto- 3- (methylthio-phosphoryl)pyrazoles
Emna Chebil and Soufiane Touil
[FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00067]
It is well known that Lawesson’s reagent (LR) reacts with hydrazone derivatives at 80°C to yield 3 - thioxo -1,2 ,3-diazaphospholine derivatives. We show, in the present investigation , that the reaction of LR with β -phosphoryl -β ’- carbethoxyhydrazones under the same conditions, took an entirely different course and gave a new type of pyrazole derivatives, the 5 -mercapto-3 - (methylthiophosphoryl)pyrazoles.
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A Convenient Method for the Preparation of 2,4,5- triaryl Imidazoles Using Barium Chloride Dispersed on Silica Gel Nanoparticles (BaCl 2-nano SiO2) as Heterogeneous Reusable Catalyst
Mohammad R.M. Shafiee, Abbas Fazlinia, Najme Yaghooti and Majid Ghashang
[FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00068]
A simple and eco-friendly procedure for the synthesis of 2,4,5 - triaryl imidazoles by using Barium chloride dispersed on silica gel nano particles (BaCl2-nano SiO2) as heterogeneous reusable catalyst in high yield under thermal conditions has been described.
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An Efficient Synthetic Method for Phenylalanine Containing Crown Ether Ring
Xia Tian, Fang Li, Jianrong Han, Xiaoli Zhen and Shouxin Liu
[FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00069]
An efficient, convenient synthesis method has been introd uced for the preparation of phenylalanine containing crown ether ring by n ucleophilic substitution , nitrosation and reduction reaction using benzo - crown ether and dimethyl malonate a s material. T he structures of the product are characterized by 1HNMR, MS and element analysis.
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New Route for the Synthesis of Chiral Hydrazine SADP
Tao Jia
[FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00070]
A convenient route for the synthesis of (S)-1 - amino - 2 -(1 -methoxy-1-methylethyl)pyrrolidine (SADP ) was established. T he route involved three key steps viz. the Grignard addition to the N -Boc-pr o line ester (1), nitrosation to the aminoalcohol hydrochloride (3 ) and O-methylation to the alcohol group of N -nitrosopyrrolidine (4). (S)-1,1-dimethyl –tetrahydropyrrolo [1,2 - c]oxazol -3 -one (6) was also obtained via the reaction of (S)-1 -Boc-2 -(1 -hydroxy- 1-methylethyl)pyrrolidine (2) with sodium hydride.
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Synthesis of (+) - (4 S ,5 S ) - Muricatacin via Pd- Catalyzed Stereospecific Hydroxy Substitution Reaction of γ , δ - epoxy α , β - Unsaturated Ester with B(OH)3
Gowravaram Sabitha, G. Chandrashekhar, D. Vasudeva Reddy and J.S. Yadav
[FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00071]
The stereoselective synthesis of (+)- (4 S ,5 S )-muricatacin has been achieved involving the palladium - catalyzed stereospecific hydroxy substitution reaction of γ ,δ - epoxy α ,β -unsaturated ester with B(OH).
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Comparative Study for the Aqeous Synthesis of New Generation of Diindolylmethanes Using L- Proline, K10 and Nano- Fe3 O4 under Ultrasound Irradiation
Mohammad Nikpassand, Leila Zare and Mohammad R. Mousavi
[FULL-TEXT INQUIRY] [BSP/LOC/E-Pub/00072]
An efficient nucleophilic addition reaction of indole derivatives with various synthesized azo -linked aldehydes to afford novel derivatives of diindolylmethane was carried out using a catalytic amount of L -proline, K10 and nano-Fe3 O 4 in aqeous media.
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