Structure determination and synthesis of a new gibberellin, GA99, from spinach plants: 2β-hydroxy-GA19
作者:Lewis N. Mander、David J. Owen
DOI:10.1016/0040-4039(95)02252-x
日期:1996.1
The structure of a new gibberellin, GA99, isolated from Spinach plants has been determined to be 2β-hydroxy-GA19 (6) by synthesis from gibberellic acid. The key steps in the preparation involved the reduction under Luche conditions of a δ1(10)-2-one derivative to furnish the critical 2β-stereochemistry, intramolecular cyclopropanation of the δ1(10) bond by a 4α-diazoacetyl group followed by LiNH3
通过从赤霉素合成可以确定从菠菜植物中分离出的一种新赤霉素GA 99的结构为2β-羟基-GA 19(6)。在制备中的关键步骤涉及到的的Luche条件下还原δ (10)1 -2-酮衍生物,得到的临界2β-立体化学,所述的分子内环丙烷δ 1(10)由一个4α-重氮乙酰基基团键,接着Li 3 NH 3还原,然后通过衍生的烯醇钾的氧化将所得的环戊酮氧化裂解。