查人人中国名人网梦幻西游元神幻化次数:专业英语的翻译
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/02 16:15:17
However, few of them are of broad scope. Most of them are only well suited for the preparation of specific classes of 1,2-diamines such as primary, secondary, or tertiary diamines, or only syn or anti compounds. Other ones only allow the formation of symmetrical 1,2-diamines.A more general way to prepare vicinal diamines selectively is thus still sought after. Considering the topical development of catalytic enantioselective synthesis, one can envision that asymmetric diamination of alkenes might be a convenient response to this problem. Other solutions will probably then be designed, since, as can be seen from the many examples of syntheses summarized in this review, one thing organic chemists certainly do not lack is imagination.
但是, 少数他们是宽广的范围。大多数是只好的适合于1,2 二胺具体组的准备譬如主要, 次要,或三重二胺、或唯一syn 或反化合物。其它部分只允许对称1,2-diamines.A 更加一般的方式的形成准备vicinal 二胺以后仍然因而有选择性地被寻找。就催化作用的enantioselective 综合的典型发展而论, 你可能构想, 烯烃的不对称的diamination 也许是对这个问题的一个方便反应。其它解答大概然后将被设计, 因为, 和能被看见从综合许多例子被总结在这回顾, 有机化学家一定不缺乏的一件事想像力。