Absolute Structures of Some Naturally Occurring Isopropenyldihydrobenzofurans, Remirol, Remiridiol, Angenomalin, and Isoangenomalin
作者:Seiji Yamaguchi、Shizuko Muro、Masahide Kobayashi、Masahiro Miyazawa、Yoshiro Hirai
DOI:10.1021/jo034396j
日期:2003.8.1
(DHQD)(2)AQN gave the corresponding chiral 2-isopropenyl-2,3-dihydrobenzofurans. Chiral (S)-(+)-4 (99% ee, using (DHQD)(2)AQN) was converted to natural remirol (S)-(+)-1a and then to natural remiridiol (S)-(+)-1b. (S)-(+)-8 (97% ee, using (DHQD)(2)AQN) was converted to natural angenomalin (S)-(+)-2. (R)-(-)-11c (>99% ee, using (DHQ)(2)AQN), was converted to natural isoangenomalin (R)-(+)-3. Thus, the absolute
一些天然存在的手性2-异丙烯基-2,3-二氢苯并呋喃,(+)-镜像醇(1a),(+)-反丙二醇(1b),(+)-血管内皮素(2)和(+)-的绝对结构异Angenomalin(3),通过各自的手性合成进行了研究。外消旋2-异丙烯基-2,3-二氢苯并呋喃,2-异丙烯基-4,6-二甲氧基-2,3-二氢苯并呋喃的动力学拆分(4),4-羟基-2-异丙烯基-2,3-二氢苯并呋喃-5-甲醛(8)和2-异丙烯基-6-(MOM)氧基-2,3-二氢苯并呋喃-5-甲醛(11c),使用(DHQ)(2)AQN或(DHQD)(2)AQN通过Sharpless二羟基化反应制得相应的手性2-异丙烯基-2,3-二氢苯并呋喃。将手性(S)-(+)-4(99%ee,使用(DHQD)(2)AQN)转化为天然视黄醇(S)-(+)-1a,然后转化为天然雷米洛二醇(S)-(+) -1b。(S)-(+)-8(97%ee,使用(DHQD)