以 4- 硝基查耳酮为原料的反应,其产物可获得最高达96%ee值.Up to 96 % ee was achieved with 4 - nitro - chalcone as enone substrate.查耳酮类化合物是合成黄酮类化合物重要的中间体, 具有重要的药理作用.Chalcon is an important intermediate for synthesizing flavone, and has variety of...
Unlike other trees, it doesn't taper very much. It stays fat all the way up.和别的树不同，它不是越往上越细，而是上下一样粗。If the charcoal does fail to light, use a special liquid spray and light it with a long taper.要是木炭确实着不了的话，使用一种特殊的液体...
They trekked from shop to shop in search of white knee-length socks.他们拖着步子从一家商店走到另一家，寻找齐膝的白袜子。In the winter she wears thick socks, Wellington boots and gloves.冬天，她穿着厚袜子和橡胶雨靴，戴着手套。She knitted him 10 pairs of socks to take...
We women have a lot of good business skills, although we tend to underrate ourselves.我们女性拥有很多出色的商业技巧，只是我们往往会看轻自己。I don't underrate the decorative side of life.我并不低估生活中起装饰作用的东西的价值.Let no man underrate our energies, o...
Mangers should pay more attention to the agendas of meetings.经理应该更加关注会议的日程安排.The leaders of the trade union were charged with selling out to the mangers.工会领导被指责背叛了自己的立场,倒向了雇主....
Coventry Cathedral has modern architecture.考文垂大教堂有着非常现代的建筑风格.I took my first extra-mural course in 1948 in Coventry, even though I was working in Birmingham...1948年我在考文垂第一次上校外课，虽然当时我在伯明翰工作。The campus is linked by regular...