作者:Kensuke NABETA、Masateru YAMAMOTO、Hiroyuki KOSHINO、Hiroki FUKUI、Yukiharu FUKUSHI、Satoshi TAHARA
DOI:10.1271/bbb.63.1772
日期:1999.1
The absolute configurations of the rare sesquiterpenes, kelsoene and prespatane, were determined to be (1S, 2R,5S, 6S, 7R, 8R)-2,8-dimethyl-6-(1-methylethenyl)tricyclo[5.3.0.0(2,5)] decane (IUPAC name) and (1R, 2S, 5R, 6R, 7R, 8S)-1,5-dimethyl-8-(1-methylethenyl) tricyclo-[5.3.0.0(2,6)] decane, respectively, on the basis of the observed chemical shifts and NOEs in NOESY and NOEDS experiments after
稀有倍半萜烯,煤油和庚烷的绝对构型确定为(1S,2R,5S,6S,7R,8R)-2,8-二甲基-6-(1-甲基乙烯基)三环[5.3.0.0(2 ,5)]癸烷(IUPAC名称)和(1R,2S,5R,6R,7R,8S)-1,5-二甲基-8-(1-甲基乙烯基)三环-[5.3.0.0(2,6)]癸烷分别基于在手性试剂2'-甲氧基-1,1'-联萘-2-碳氢氧肟基氯(MBCC)转化后在NOESY和NOEDS实验中观察到的化学位移和NOE。如此确定的煤油和庚烷的绝对构型表明,FPP从C-10处的si表面初始环化以形成10R-germacradienyl阳离子会导致生成油黄酮,而从表面的FPP会通过10S-germacradienyl导致产生前庚烷。阳离子。