GENEVA, June 2 (Xinhua) -- Intensifying global trade tensions are taking a toll on labor markets across the world, Gilbert F. Houngbo, director-general of the International Labour Organization (ILO), ...

Seyferth-Gilbert增碳反应是指在碱催化下重氮甲基膦酸二甲酯与醛或芳基酮在低温下反应得到炔的反应。 Ohira-Bestmann改进法转而使用1-重氮基-2-氧代丙基膦酸二甲酯可以使碱不稳定的易互变异构化的醛发生反应，而在Seyferth-Gilber条件下主要发生羟醛缩合： Seyferth ...