Directed <i>ortho</i> Metalation Strategies. Effective Regioselective Routes to 1,2-, 2,3-, and 1,2,3-Substituted Naphthalenes
作者:Katherine Groom、S. M. Shakil Hussain、Justin Morin、Christian Nilewski、Toni Rantanen、Victor Snieckus
DOI:10.1021/ol500707w
日期:2014.5.2
regioselective synthesis of 2,3-di- and 1,2,3-trisubstituted naphthalenes via Directed ortho Metalation (DoM) strategies of N,N-diethyl-O-naphthyl-2-carbamate (1) is presented. Sequential LiTMP metalation–electrophile quench and s-BuLi/TMEDA (or t-BuLi)-electrophile quench of naphthyl-2-carbamate 1 provides a general route to contiguously substituted naphthalenes (6) with full regioselectivity. Further
经由定向的2,3-二-和区域选择性合成1,2,3-三取代的萘邻金属化(d ø M)的策略Ñ,Ñ二乙基ö萘-2-氨基甲酸酯(1)的设计。萘基-2-氨基甲酸酯1的连续LiTMP金属化-亲电猝灭和s -BuLi / TMEDA(或t -BuLi)-亲电猝灭提供了一种具有完全区域选择性的连续取代萘(6)的通用途径。通过进一步的衍生化本位-halodesilylation和铃木-宫浦交叉偶合最终导致取代halonaphthalenes和benzonaphthopyranones(9)。