作者:Joachim Podlech、Judith Cudaj
DOI:10.1055/s-0031-1290135
日期:2012.2
The resorcylic lactone alterlactone, a mycotoxin produced by alternaria sp., was synthesized for the first time. The total synthesis was achieved in nine steps with 69% yield starting with acetal-protected phloroglucinic acid and 6-bromopiperonal, where the longest linear sequence consists of five steps. Key step is a Suzuki coupling used for the construction of the central biaryl bond. When the final deprotection with cleavage of benzyl ethers (yielding unprotected alterlactone) was performed in a less polar solvent the biaryl mycotoxin altenusin was obtained.
首次合成了由Alternaria属产生的麦角酸内酯alterlactone。这一全合成在九个步骤中实现,总产率为69%,起始材料是醇保护的酚羟酸和6-溴吡啶醛,其中最长的线性序列包含五个步骤。关键步骤是用于构建中心双芳基键的鈴木偶联反应。当最后一次脱保护反应在一种较少极性的溶剂中进行,以裂解苄醚(生成未保护的alterlactone)时,得到了双芳基麦角毒素altenusin。