• 제목/요약/키워드: Choi Young Sung

검색결과 6,456건 처리시간 0.038초

Single Pass Radionuclide 심혈관 촬영술로 진단된 대동맥류에 의한 상대정맥 증후군 1예 (A Case of Superior Vena Cava Syndrome Secondary to Aortic Aneurysm Diagnosed with Single Pass Radionuclide Cardiac Angiography)

  • 최지영;김기우;신동진;목차수;이강욱;박소배;최대섭
    • 대한핵의학회지
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    • 제23권1호
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    • pp.89-93
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    • 1989

  • Single pass radionuclide cardiac angiography was performed in 67-year old woman due to dyspnea and chest discomfort. The study showed markedly dilated ascending aorta and collateral ciculations from left sudclavian vein, and confirmed aortic aneurysm with partial obstruction of superior vena cava.

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Diastereoselective Synthesis of Polysubstituted Pyrrolidinone as a Key Intermediate for the Anticancer Agents by Palladium(II)­Catalyzed Carboxylation

  • Choi Dong-Rack;Lee Kee-Young;Chung Yun-Sung;Joo Jae-Eun;Kim Yong-Hyun;Oh Chang-Young;Lee Yiu-Suk;Ham Won-Hun
    • Archives of Pharmacal Research
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    • 제28권2호
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    • pp.151-158
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    • 2005

  • Palladium(II)-catalyzed carboxylation of chiral olefins 6a-d has been examined under various conditions. In the weak basic condition ($K_{2}CO_3$), 7a-d were obtained in good yields. Alternatively, in the strong basic condition, pyrrolidinones 8a-d were obtained resulting in excellent yields and with high diastereoselectivity.

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