Yield:-

Steps:

Multi-step reaction with 2 steps
1: triethylamine; palladium diacetate; 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene / N,N-dimethyl-formamide / 12 h / 100 °C
2: lithium hydroxide; water / tetrahydrofuran; methanol / 3 h / 20 °C

References:

Cheng, Huimin;Chang, Yu;Zhang, Lianwen;Luo, Jinfeng;Tu, Zhengchao;Lu, Xiaoyun;Zhang, Qingwen;Lu, Jibu;Ren, Xiaomei;Ding, Ke [Journal of Medicinal Chemistry,2014,vol. 57,# 6,p. 2692 - 2703]