Synthesis of 2-Substituted Dihydropyran 3-O-Carbamates via Combined Metalation−Suzuki−Miyaura Cross-Coupling Reactions
摘要:
Treatment of 6-[(N,N-diethylcarbamoyl)oxy]-3,4-dihydro-2H-pyran (8) with t-BuLi followed by quench with a variety of electrophiles leads to 2-substituted products 9a-j (Table 2) in modest to good yields. The thereby obtained 2-boronic acid (11) and iodo (9j) derivatives undergo Suzuki-Migaura cross-coupling reactions to afford 2-aryl and -heteroaryl dihydropyran O-carbamates 12a-d in excellent yields.
Synthesis of 2-Substituted Dihydropyran 3-O-Carbamates via Combined Metalation−Suzuki−Miyaura Cross-Coupling Reactions
摘要:
Treatment of 6-[(N,N-diethylcarbamoyl)oxy]-3,4-dihydro-2H-pyran (8) with t-BuLi followed by quench with a variety of electrophiles leads to 2-substituted products 9a-j (Table 2) in modest to good yields. The thereby obtained 2-boronic acid (11) and iodo (9j) derivatives undergo Suzuki-Migaura cross-coupling reactions to afford 2-aryl and -heteroaryl dihydropyran O-carbamates 12a-d in excellent yields.
Synthesis of 2-Substituted Dihydropyran 3-<i>O</i>-Carbamates via Combined Metalation−Suzuki−Miyaura Cross-Coupling Reactions
作者:Justin F. Bower、Denis Guillaneux、Thai Nguyen、Poh Lee Wong、Victor Snieckus
DOI:10.1021/jo971771x
日期:1998.3.1
Treatment of 6-[(N,N-diethylcarbamoyl)oxy]-3,4-dihydro-2H-pyran (8) with t-BuLi followed by quench with a variety of electrophiles leads to 2-substituted products 9a-j (Table 2) in modest to good yields. The thereby obtained 2-boronic acid (11) and iodo (9j) derivatives undergo Suzuki-Migaura cross-coupling reactions to afford 2-aryl and -heteroaryl dihydropyran O-carbamates 12a-d in excellent yields.