作者:Minoru Isobe、Yoshiyasu Ichikawa、Dong-Lu Bai、Hisanori Masaki、Toshio Goto
DOI:10.1016/s0040-4020(01)86918-0
日期:——
Three segments A, B and C for okadaic acid synthesis were coupled with each other in the order of A+(B+C), the key steps of the twice couplings being between sulfone carbanions and aldehydes. After the B+C coupling, the asymmetric center C-27 was generated by a hydride reduction of the corresponding ketone 16 under electronic control. The second coupling was followed to form the C- double bond. Oxidation
用于冈田酸合成的三个链段A,B和C以A +(B + C)的顺序相互偶联,两次偶联的关键步骤是在砜碳负离子和醛之间。在B + C偶合之后,在电子控制下通过氢化还原相应的酮16产生不对称中心C-27。随后进行第二次偶联以形成C-双键。用亚氯酸钠将α-氧醛36氧化成羧酸基团,而没有C-1 / C-2键断裂。由市售的D-葡萄糖衍生物和丁炔-二醇以106个步骤完成了冈田酸的总合成。