A stereodivergent protecting-group-directed Tsuji–Trost cyclization for efficient synthesis of both 2,5-cis- and 2,5-trans-disubstituted-THF scaffolds has been realized. The presence of a β-O-silyl group in allyl acetate results in cis-2,5-disubstituted-3-oxygenated THF in a good up to 9 : 1 dr. Alternatively, when the free OH at the β-position is available for acetate co-ordination, it gives a trans-2
已经实现了立体发散保护基导向的 Tsuji-Trost 环化,可有效合成 2,5-顺式和 2,5-反式二取代-THF 支架。
乙酸烯丙酯中β- O-甲
硅烷基的存在导致顺式-2,5-二取代-3-氧化 THF 的比例高达 9:1 dr。或者,当 β 位的游离 OH 可用于
乙酸酯配位时,它会产生反式-2,5-二取代-3-羟基 THF 支架,几乎是单一的非对映异构体(高达 1:0 dr)。合成的 THF 支架在氧脂和 (+)-petromyroxol 的全合成中进行。