Metachloropehoxybenzoic acid promoted stereoselective synthesis of 2,5-disubstituted tetrahydrofurans from α or γ-allyl-β-hydroxy esters: A formal synthesis of (±) methyl nonactate
作者:Javed Iqbal、Anu Pandey、Bhanu P.S Chauhan
DOI:10.1016/s0040-4020(01)86451-6
日期:1991.1
A one pot stereoselective synthesis of cis or trans 2,5-disubstituted tetrahydrofurans 3–8 can be achieved in high yields via electrophilic cyclisation of the corresponding cis or trans α or γ-allyl-β-hydroxyesters mediated by metachloroperoxybenzoic acid. The tetrahydrofurans 5 or 6 may be converted into (±) methyl nonactate by procedures described earlier. The role of methoxycarbonyl group during
顺式或反式2,5-二取代的四氢呋喃的一锅立体选择性合成3 - 8可以以高的产率通过由metachloroperoxybenzoic酸介导的相应的顺式或反式或αγ-烯丙基-β羟基酯的电环化而实现。可以通过先前描述的方法将四氢呋喃5或6转化为(±)非乳酸甲酯。讨论了在这些环化过程中甲氧羰基的作用。