1 0 0 0 OA ロイコトリエンの構造と合成
- 著者
- 橋本 俊一 戸田 正明
- 出版者
- The Society of Synthetic Organic Chemistry, Japan
- 雑誌
- 有機合成化学協会誌 (ISSN:00379980)
- 巻号頁・発行日
- vol.41, no.3, pp.221-238, 1983-03-01 (Released:2009-11-13)
- 参考文献数
- 73
- 被引用文献数
- 2 2
The recent discovery of the new family of compounds, named leukotrienes because of their origin from leukocytes and a structural characteristic, the conjugated triene, has significantly increased our knowledge of arachidonic acid metabolism.This review will focus on the chemistry leading to the complete stereochemical elucidation of the leukotrienes, as well as more recent synthetic advances.
1 0 0 0 OA 5%Mn鋼における残留オーステナイトの機械的特性に及ぼす影響
- 著者
- 棗田 浩和 北原 周 橋本 俊一
- 出版者
- 一般社団法人 日本鉄鋼協会
- 雑誌
- 鉄と鋼 (ISSN:00211575)
- 巻号頁・発行日
- vol.102, no.9, pp.525-533, 2016 (Released:2016-08-31)
- 参考文献数
- 31
- 被引用文献数
- 9 14
Recently, 5% Mn steel has been focused on as one of the promising candidates for third generation AHSS by showing an excellent TS-El relationship. The excellent TS-El relationship is brought about by a large volume fraction of retained austenite through the enrichment of austenite stabilizing elements such as C and Mn in reverted austenite. The effect of the microstructure of mother hot band on the changes in microstructure and mechanical properties was compared with the intercritical annealing time in this study. The steel containing about 10% of retained austenite in a mother hot band exhibited a higher volume fraction of retained austenite and higher strength. On the other hand, the steel which did not contain retained austenite in a mother hot band exhibited excellent strength-elongation combination. The difference of work hardening behavior in these steels was analyzed and thought to be brought about by the difference of transformation behavior during deformation determined by the stability of retained austenite affected by Mn concentration.
1 0 0 0 OA 含リン脱離基を基盤とする高選択的グリコシル化反応
- 著者
- 橋本 俊一 本田 雄 柳谷 由己 中島 誠 池上 四郎
- 出版者
- The Society of Synthetic Organic Chemistry, Japan
- 雑誌
- 有機合成化学協会誌 (ISSN:00379980)
- 巻号頁・発行日
- vol.53, no.7, pp.620-632, 1995-07-01 (Released:2009-11-16)
- 参考文献数
- 38
- 被引用文献数
- 4 6
The rational design and development of stereocontrolled glycosidation reactions has been the subject of intensive investigations. Our interest in this context has been centered on the design of the leaving groups of glycosyl donors coupled with their activation without resorting to precious, explosive, or toxic heavy-metal salts as promoters. In an effort to capitalize on the phosphorus-containing leaving groups, we have recently devised new glycosyl donors incorporating diphenyl phosphate, diphenylphosphinimidate, N, N, N', N'-tetramethylphosphoroamidate, phosphorodiamidimidothioate, or diethyl phosphite as leaving groups, the glycosidations of which constitute mild and efficient methods for the highly stereocontrolled construction of 1, 2-trans-β-and 1, 2-cis-α-glycosidic linkages. In this paper, several notable features of the present glyosidation methods coupled with the mechanistic aspects are described.
1 0 0 0 フォルスコリン合成中間体の構造
- 著者
- 上村 みどり 小谷野 和郎 橋本 俊一 坂田 紳二 池上 四郎
- 出版者
- The Crystallographic Society of Japan
- 雑誌
- 日本結晶学会誌 (ISSN:03694585)
- 巻号頁・発行日
- vol.32, pp.82-82, 1990
