An improved synthesis of nereistoxin (VII or XIII ; R3=CH3) was achieved via the intermediates VIII (R3=CH3), X (R3=CH3) and XII (R3=CH3) as summarized in Chart 2. Applying the reactions formulated in Chart 1 and Chart 2, a number of amines were prepared, whereby the occurrence of intermediates, cyclic sulfonium (III) in the amination reaction in Chart 1 and cyclic immonium (IX) in the thiolation reaction in Chart 2 respectively, was suggested.
如图 2 所示,通过中间体 VIII(R3=
CH3)、X(R3= )和 XII(R3= ),改进了獐牙菜毒素(VII 或 XIII;R3= )的合成。应用图 1 和图 2 中的反应,制备出了一些胺,并分别在图 1 中的胺化反应和图 2 中的
硫代反应中出现了中间体环状锍 (III)和环状亚锍 (IX)。