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Chate, Asha V.,Joshi, Ratnadeep S.,Badadhe, Pravin V.,Dabhade, Sanjay K.,Gill, Charansingh H. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.11
An efficient synthesis of 1,5-Benzothiazepines via Michael addition of corresponding (E)-1-(2-hydroxyphenyl)-3-(4-(phenylthio)phenyl)prop-2-en-1-one is described under ultrasound irradiation. A series of novel 2-((E)-2,3-dihydro-2-(4-(phenylthio)phenyl)benzo[b][1,4]thiazepin-4-yl)phenol derivatives was confirmed on the basis of $^1H$ NMR, Mass, IR spectral data and Elemental analysis. The synthesized compounds were evaluated for their antimicrobial activities. Most of the compounds were found to be comparable potent than the reference standard drugs. Utilization of ultrasound irradiation, simple reaction conditions, isolation, and purification makes this manipulation very interesting from an economic and environmental perspective.
An Improved Procedure for the Synthesis of 1,5-Benzothiazepines Using Ceric Ammonium Nitrate (CAN)
Chate, Asha V.,Joshi, Ratnadeep S.,Mandhane, Priyanka G.,Gill, Charansingh H. Korean Chemical Society 2011 대한화학회지 Vol.55 No.5
A mild and efficient procedure for the synthesis of various 1,5-benzothiazepines were developed. This method provides an easy access for preparation of 1,5-benzothiazepine derivatives in the presence of 10 mol% catalyst of CAN under ultrasonic irradiation. This method provided clean conversion, mild reaction condition, no use of toxic solvent and shorter reaction time compared to other reported method.
Nanocrystalline CdSe: Structural and Photoelectrochemical Characterization
P.A. Chate,S.S. Patil,J.S. Patil,D.J. Sathe,P.P. Hankare 대한금속·재료학회 2012 ELECTRONIC MATERIALS LETTERS Vol.8 No.6
Nanocrystalline cadmium selenide thin films have been deposited on non-conducting glass substrates using oxalic acid. The film thickness was found to be 0.73 μm with a growing time of 6 h. The structural, morphological,optical, electrical properties of samples were studies. Photoelectrochemical performance was also studied. Room temperature deposition results in films with the cubic structure and crystallite size of about 19.33 nm. The optical band gap energy of the film sample was found to be 1.91 eV. The efficiency of photoelectrode was found to be 1.1% using sulphide-polysulphide electrolyte.
Asha V. Chate,Sanjay K. Dabhade,Pravin V. Badadhe,Ratnadeep S. Joshi,Charansingh H. Gill 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.11
An efficient synthesis of 1,5-Benzothiazepines via Michael addition of corresponding (E)-1-(2-hydroxyphenyl)-3-(4-(phenylthio)phenyl)prop-2-en-1-one is described under ultrasound irradiation. A series of novel 2-((E)-2,3-dihydro-2-(4-(phenylthio)phenyl)benzo[b][1,4]thiazepin-4-yl)phenol derivatives was confirmed on the basis of 1H NMR, Mass, IR spectral data and Elemental analysis. The synthesized compounds were evaluated for their antimicrobial activities. Most of the compounds were found to be comparable potent than the reference standard drugs. Utilization of ultrasound irradiation, simple reaction conditions, isolation, and purification makes this manipulation very interesting from an economic and environmental perspective.
Badadhe, Pravin V.,Chate, Asha V.,Hingane, Dattatraya G.,Mahajan, Pravin S.,Chavhan, Namdev M.,Gill, Charansingh H. Korean Chemical Society 2011 대한화학회지 Vol.55 No.6
Thiamine hydrochloride (VB1) has been used as an acid catalyst in organic synthesis. One pot three component Biginelli condensation of dimedone, urea/thiourea and substituted aromatic aldehydes catalyzed by 10 mol % of thiamine hydrochloride (VB1) in solvent free condition under microwave irradiation in good to excellent yields has been investigated. Utilization of microwave irradiation, simple reaction conditions, short reaction time, ease of product isolation, and purification makes this manipulation very interesting from an economic and environmental perspective.
Joshi, Ratnadeep S.,Mandhane, Priyanka G.,Chate, Asha V.,Khan, Wajid,Gill, Charansingh H. Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.8
A convenient synthesis of substituted [1,2,4]-triazolo [1',2':1,2]pyrimido[6,5-b]-quinoline 4(a-i) from substituted 2-chloroquinoline-3-carbaldehyde 1(a-i) and 4H-1,2,4-triazol-3-amine 2 by using $SiO_2/K_2CO_3$ under microwave irradiation. This method affords the [1,2,4]-Triazolo [1',2':1,2]pyrimido[6,5-b]-quinoline 4(a-i) under the influence of microwave irradiation in solvent-free conditions within short span (12 - 20 min), & gaves excellent yields (89 - 95%). All the synthesized compounds were further screened for their antibacterial activities. Some of our compounds showed excellent antibacterial activities against control drugs.
Joshi, Ratnadeep S.,Mandhane, Priyanka G.,Chate, Asha V.,Gill, Charansingh H. Korean Chemical Society 2011 대한화학회지 Vol.55 No.5
A new series of 1-(5-(2-tolyloxyquinoline-3-yl)-2-(pyridine-4-yl)-1,3,4-oxidiazol-3(2H)-yl)ethanones were synthesized from cyclisation of N'-((2-(p-tolyloxy)quinoline-3-yl)methylene) isonitonohydrazide in acetic unhydride at reflux condition for 3-4 hr. The structures of the new compounds were confirmed by elemental analyses as well as IR, 1H NMR and mass spectral data. All the synthesized compounds were screened for their antibacterial activities against various bacterial strains. Several of these compounds showed potential antibacterial activity.
VoIP 프레즌스 서비스에 적용 가능한 XCAP 기반 권한관리기법 설계
이태진(Taijin Lee),원용근(Yonggeun Won),임채태(Chate Im),원유재(Youjae Won) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.1D
SIP 기반 프레즌스 서비스는 향후 유비쿼터스 시대의 상황인지형 서비스를 비롯한 다양한 곳에 응용될 수 있는 핵심서비스이다. 또한 프레즌스 서비스는 개인의 프라이버시 문제를 다루기 때문에, 권한관리를 위해 draft로 제시되어 있는 XCAP 기반 기술이 주요 이슈로 대두되고 있다. 그러나, 현재 프레즌스 기반구조를 활용한 응용서비스 모델이 제시되어 있지 않으며, XCAP 기반 권한관리 기술이 적용된 사례가 나와있지 않다. 본 논문에서는 VoIP에 적용 가능한 프레즌스 서비스 모델을 선정하고, 서비스 개발을 위한 프레즌스 기반구조의 적용방법, XCAP 기반 권한관리 기술의 적용방안을 설계하였다. 본 논문을 통해 중요한 서비스로 인식되면서도 마땅한 서비스가 발굴되지 않은 현실에서, 프레즌스 기반 서비스 개발 및 XCAP 기반 권한관리 기술개발을 위한 참조모델로 활용할 수 있다. 특히, 보안에 민감한 프라이버시 정보를 다루는 프레즌스 서비스 보호를 위해 XCAP 기반기술은 반드시 필요하며, 임의의 응용서비스에 독립적으로 적용할 수 있는 XCAP 기반기술의 특징을 고려하면 더욱 큰 의미를 지닌다.
Ratnadeep S. Joshi,Priyanka G. Mandhane,Asha V. Chate,Wajid Khan,Charansingh H. Gill 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.8
A convenient synthesis of substituted [1,2,4]-triazolo [1’,2’:1,2]pyrimido[6,5-b]-quinoline 4(a-i) from substituted 2-chloroquinoline-3-carbaldehyde 1(a-i) and 4H-1,2,4-triazol-3-amine 2 by using SiO2/K2CO3 under microwave irradiation. This method affords the [1,2,4]-Triazolo [1’,2’:1,2]pyrimido[6,5-b]-quinoline 4(a-i) under the influence of microwave irradiation in solvent-free conditions within short span (12 - 20 min), & gaves excellent yields (89 -95%). All the synthesized compounds were further screened for their antibacterial activities. Some of our compounds showed excellent antibacterial activities against control drugs.