A totalsynthesis of a sulfated lipooligosaccharide, the nodulationsignal involved in the symbiosis of rhizobium meliloti-alfalfa, was achieved in a stereocontrolled manner.
以立体控制的方式实现了硫酸化的脂寡糖的全合成,这是涉及根瘤菌-苜蓿共生的结节信号。
New access to lipo-chitooligosaccharide nodulation factors
Sulfonated and non-sulfonated lipo-chitooligosaccharides involved in Sinorhizobium meliloti–legume symbiosis are efficiently obtained on a multi mg scale by a 2-step procedure combining biotechnological and chemical approaches.
SYNTHETIC LIPOAMINO ACID GLUCOSAMINE DERIVATIVES FOR IMPROVEMENT OF PLANT GROWTH AND YIELD
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:US20160021879A1
公开(公告)日:2016-01-28
The invention provides compounds, formulations and methods for improving plant emergence, growth and yield. More specifically, the present invention relates to compositions comprising the synthetic lipoamino acid glucosamine compounds of Formula I. These compounds may be applied to plant propagating materials, including seeds and other regenerable plant parts, including cuttings, bulbs, rhizomes and tubers. They may also be applied to foliage, or soil either prior to or following planting of plant propagating materials. Such applications may be made alone or in combination with fungicides, insecticides, nematicides and other agricultural agents used to improve plant growth and crop yield. The compounds of Formula I can improve the agronomic performance of a variety of crops including barley, canola, corn, potato, soybean and wheat.
Processes for the synthesis of lipochitooligosaccharides were developed. A fully acylated oligoglucosamine precursor is prepared and reacted with a glucosamine monomer that has an amine protecting phthaloyl group. With removal of the phthaloyl group, a fatty acid may be added on the terminal glucosamine unit, forming a lipochitooligosaccharide. The processes can be adapted for use on a commercial scale.