• 대한화학회지
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• 제49권2호
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• pp.173-181
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• 2005

• Bulletin of the Korean Chemical Society
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• 제32권4호
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• pp.1383-1386
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• 2011

• Journal of Photoscience
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• 제10권1호
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• pp.49-60
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• 2003

How stereo selectivity in singlet and triplet photocycloaddition and photocyclization reactions, respectively, is linked to spin selectivity and how this link affects our understanding of photochemical reaction mechanisms, is described in this review. As illustrative examples, the Paterno-Buchi reaction and the Norrish-Yang cyclization are described with emphasis on triplet biradical structure and dynamics.

• 대한화학회지
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• 제46권6호
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• pp.585-589
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• 2002

• 대한화학회지
• /
• 제49권4호
• /
• pp.389-398
• /
• 2005

• 대한화학회지
• /
• 제49권4호
• /
• pp.363-369
• /
• 2005

• Bulletin of the Korean Chemical Society
• /
• 제35권4호
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• pp.985-986
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• 2014

• Bulletin of the Korean Chemical Society
• /
• 제25권11호
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• pp.1625-1626
• /
• 2004

• Bulletin of the Korean Chemical Society
• /
• 제16권10호
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• pp.985-988
• /
• 1995

2-Epideoxymannojirimycin 1 and (2R,3R,4R,5R)-3,4,5-trihydroxypipecolic acid 2 were prepared starting from D-glucosamic acid as a chiral educt. Key transformations were selective removal of the terminal isopropylidene group and intramolecular cyclization by SN2 reaction.

• Archives of Pharmacal Research
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• 제23권2호
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• pp.99-103
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• 2000

Acid and base catalyzed intramolecular cyclizations of N-benzoylthioureidoacetal, contain-ing four functional groups adjacent to thiourea such as benzocarbamoyl, acetal, thioure and amide, were investigated. The condensation reaction of N-benzoyl thiocarbamoylgly-cine amide in the presence of 10% aqueous NaOH provided 1-(2,2-dimethoxy)ethyl-imi- dazolidine-2-thione exclusively. In the presence of pyridine, it was transformed to 2- thiohydantoin. N-Benzoyl thiocarbamoyl glycine amide was completely transformed to an iminothiazolidine exclusively in the presence of Lewis acid such as borontrifluoride ether-ate or trimethylsilyl iodide. 1-(2,2-Dimethoxy)ethyl-imidazolidine-2-thione was transformed to imidazole[2,1-b]thiazole and pyrazino[5,1-a]imidazole in the presence of $BF_3$.$ET_2$O and formic acid, respectively.