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Pd(0)과 Ni(Ⅱ)촉매하의 Grignard시약에 의한 광학활성 고리카보네이트의 알릴화 연구
강석구,조동규,박찬희 성균관대학교 기초과학연구소 1993 論文集 Vol.44 No.2
NiCl_2(dppe)또는 Pd(PPh_3)_4를 촉매로 하여 Grgnard시약과 광학 활성 알릴고리 카보네이트를 반응시켜 높은 위치 선택성과 입체선택성이 있는 알킬화된 (E)-allylic alcohol을 얻었다. Reaction of chiral allylic cyclic carbonates with Grignard reagents in the presence of NiCl_2(dppe) or Pd(PPh_3)_4 as a catalyst afforded the alkylated (E)--allylic alcohols with high regio-and diastereoselectivity.
유기구리시약을 이용한 광학활성 고리 카보네이트의 알릴화 연구
강석구,박찬희,정재욱 성균관대학교 기초과학연구소 1994 論文集 Vol.45 No.1
CuCN과 알킬리튬 시약을 이용하여 higher-order cuprate인 R_2Cu(CN)Li_2 또는 lower-order cuprate R_2Cu(CN)Li_2을 만들거나 Grignard시약과 구리촉매에 의해 R_2Cu(CN)MgX등을 형성시켜 이를 광학 활성 고리 카보네이트에 S_N2' 반응을 유도하여 높은 위치 선택성과 입체 선택성이 있는 광학 활성이 있는(E)-allylic alcohol 및 dienylic alcohol을 합성하였다. The S_N2'-type allylation reactions of chiral allylic cyclic carbonates with R_2Cu(CN)Li_2, R_2(CN)Li, or R_2Cu(CN)MgX afforded the alkylate(E)-allylic alcohol and dienylic alcohol with excellent high regio-and diasterecselectivity.
Pd(O)-촉매를 이용한 알릴 고리 카보네이트의 제거 및 분자간 축합반응 연구
강석구,박동철,박찬희,홍륭기 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.1
The alkyl substituted allylic cyclic carbonates 1a-d undergo elimination by using a catalytic amount of Pd(0) complex to form dienols 2 a-b. However, on treatment of the unsubstituted or phenyl substituted allylic cyclic carbonates 1e and 1f with Palladium(0) catalyst, deprotonation-elimination of π-allyl Palladium complex followed by condensation with the other π-allyl Palladium complex provided the coupled products 3a and 3b, respectively.
강석구,정경윤,박찬희,남궁은영,김태현 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2
The coupling reaction of iodobenzene with allylic diols in the presence of Pd(OAc)_2 and nBu_3P as catalysts using K_2CO_3 as base afforded the phenyl-substituted allylic diols. However, under the same reaction conditions with Et3N as base, phenyl-substituted α-hydroxy ketone was obtained.
( Hee Chan Ku ),( Se Youp Lee ),( Young Chun Lee ) 대한안과학회 2005 Korean Journal of Ophthalmology Vol.19 No.1
We studied the relationship between eye position in the awakened state and in the surgical plane of anesthesia in orthophoric and horizontal strabismus patients. We classified 105 orthophoric and horizontal strabismus patients into 5 groups, measured the eye position at the primary position by photographic measurement of the corneal reflex positions and undertook a quantitative study of eye position. Under general anesthesia, the mean divergence was 39.7±8 PD for the esotropia group, 36.6 ±11.7 PD for exophoria, 27.4±8.1 PD for orthophoria, and 11.1±10.2 PD for exotropia I (≤30 PD). Therefore, the esotropia group had the largest amount of divergence among the groups, but the eye position of the exotropia II (>30 PD) group was rather convergent at 11.0±6.5 PD. According to the eye position of the fixating and nonfixating eyes in the esotropia group, both eyes converged with an angle deviation of 14.4±4.8 PD divergent and 14.1±4.8 PD divergent, respectively (P=.71). In the exotropia groups (I, II), the fixating eye diverged but the nonfixating eye rather converged. Therefore, the angle deviation was 19.0±2.1 PD divergent for the fixating eye and 18.2±6.4 PD divergent for the nonfixating eye (P=.68). In conclusion, under general anesthesia, eye positions in the awakened state and in the surgical plane of anesthesia were convergent or divergent, and showed a tendency to converge into the position of 25-35 PD divergent. Therefore, we could not distinguish fixating eye from nonfixating eye under general anesthesia.
Jung, Chan-Hee,Kim, Wan-Joong,Jung, Chang-Hee,Hwang, In-Tae,Khim, Dongyoon,Kim, Dong-Yu,Lee, Jae-Suk,Ku, Bon-Cheol,Choi, Jae-Hak Elsevier 2015 Carbon Vol.87 No.-
<P><B>Abstract</B></P> <P>Facile and efficient fabrication of polyacrylonitrile (PAN)-based conductive graphitic carbon microstructures (GCMs) and their application to the electrodes of organic field-effect transistors (OFETs) is described. The PAN thin films spin-coated on a SiO<SUB>2</SUB>-deposited Si wafer was irradiated through a pattern mask with 150keV H<SUP>+</SUP> ions at various fluences, and subsequently developed to form PAN microstructures. The resulting PAN microstructures were carbonized at various temperatures to create the GCMs. The analytical results revealed that the optimized fluence and carbonization temperature for well-defined GCMs was 3×10<SUP>15</SUP> ionscm<SUP>−2</SUP> and 100°C, respectively, and that the resulting GCMs created at the optimized condition exhibited a greatly low surface roughness of 0.36nm, a good electrical conductivity of about 600Scm<SUP>−1</SUP>, and a high work function of 5.11eV. Noticeably, the GCM electrodes-based p-type OFET showed a comparable performance to that of the gold electrode-based one, demonstrating that the practical use of GCMs as cheap electrodes to replace expensive metallic ones for organic electronic devices.</P>
임신 20주 이상 지속된 선천성 자궁기형 환자에서의 산과적 예후
구연희 ( Yeon Hee Ku ),김건우 ( Kun Woo Kim ),한지혜 ( Jee Hye Han ),박현수 ( Hyun Soo Park ),박찬욱 ( Chan Wook Park ),박중신 ( Joong Shin Park ),전종관 ( Jong Kwan Jun ),윤보현 ( Bo Hyun Yoon ),신희철 ( Hee Chul Syn ) 대한산부인과학회 2007 Obstetrics & Gynecology Science Vol.50 No.5
Objective: To evaluate the pregnancy outcomes of women with congenital uterine anomaly exceeding 20 weeks of gestation. Methods: We reviewed retrospectively the birth records of the Seoul National University Hospital between January 1, 1990, and December 31, 2005. We grouped congenital uterine anomalies into five classes, namely bicornuate, didelphys, septate, arcuate, and unicornuate uterus. We compared the pregnancy outcomes with each anomaly. Results: We found 106 cases of congenital uterine anomaly within a given period of time. There were 63 cases of bicornuate uterus, 19 cases of didelphys, 16 cases of septate uterus, 5 cases of arcuate uterus, and 3 cases of unicornuate uterus. The overall preterm delivery rate was 22.6% (24/106) and cesarean section rate was 74.5% (79/106). A high cesarean section rate was due to metroplasty, abnormal fetal presentation, and uterine anomaly itself. The preterm delivery rate and cesarean section rate of each uterine anomaly did not differ statistically from one another. Five fetuses were stillborn, and one fetus died after birth because of a placenta abruption. The overall take-home baby rate was 94.3% (100/106). There was no maternal mortality and only one case was suffered from postpartum bleeding. Conclusion: Our results suggest that the most of women with uterine anomaly exceeding 20 weeks of gestation may take their baby home.
VR-Based Conversation Training Program for Patients with Schizophrenia: A Preliminary Clinical Trial
Ku, Jeonghun,Han, Kiwan,Lee, Hyung Rae,Jang, Hee Jeong,Kim, Kwang Uk,Park, Sung Hyouk,Kim, Jae Jin,Kim, Chan Hyung,Kim, In Young,Kim, Sun I. Mary Ann Liebert 2007 Cyber Psychology & Behavior Vol.10 No.4