The cyclopentenone 8, synthesised by palladium mediated ring expansion of the chiral vinylcyclobutanols 3 and 4, is converted to the thermodynamically unstable ketone 16 which on methylenation gives (+)-laurene 1.
                                    通过
钯介导手性
乙烯基环丁醇 3 和 4 的扩环合成的
环戊烯酮 8 被转化为热力学上不稳定的酮 16,经甲基化后得到 (+)- 
月桂烯 1。