Enantiodivergent syntheses of γ-substituted butenolides with tertiary and quaternary asymmetric centers
摘要:
Continuous nucleophilic addition with several organometallic reagents to tricyclic lactone (-)-1 proceeded diastereoselectively. Newly generated tertiary and quaternary asymmetric centers were controlled by the order in which the nucleophilic reagents were added. Using this methodology, enantiodivergent syntheses of several gamma-substituted butenolides with tertiary and quaternary asymmetric centers were established from a single chiral material. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of 3,11-Dioxatetracyclo[6.3.0.02,6.05,9]undecanes and 3,5,7-Trioxapentacyclo[7.2.1.02,8.04,11.06,10]dodecane
摘要:
AbstractThe synthesis of 3,11‐dioxatetracyclo[6.3.0.02,6.05,9]undecanes has been accomplished from furans in a short sequence by iodine‐induced cyclization reaction. The application of iodine‐induced cyclization reaction for the synthesis of 3,5,7‐trioxapentacyclo[7.2.1.02,8.04,11.06,10]dodecane itself was also demonstrated.
Synthesis of 3,11-Dioxatetracyclo[6.3.0.0<sup>2,6</sup>.0<sup>5,9</sup>]undecanes and 3,5,7-Trioxapentacyclo[7.2.1.0<sup>2,8</sup>.0<sup>4,11</sup>.0<sup>6,10</sup>]dodecane
作者:Hui-Chang Lin、Chung-Yi Wu、Hsien-Jen Wu
DOI:10.1002/jccs.199700094
日期:1997.12
AbstractThe synthesis of 3,11‐dioxatetracyclo[6.3.0.02,6.05,9]undecanes has been accomplished from furans in a short sequence by iodine‐induced cyclization reaction. The application of iodine‐induced cyclization reaction for the synthesis of 3,5,7‐trioxapentacyclo[7.2.1.02,8.04,11.06,10]dodecane itself was also demonstrated.
Enantiodivergent syntheses of γ-substituted butenolides with tertiary and quaternary asymmetric centers
作者:Katsufumi Suzuki、Kohei Inomata
DOI:10.1016/s0040-4039(02)02711-9
日期:2003.1
Continuous nucleophilic addition with several organometallic reagents to tricyclic lactone (-)-1 proceeded diastereoselectively. Newly generated tertiary and quaternary asymmetric centers were controlled by the order in which the nucleophilic reagents were added. Using this methodology, enantiodivergent syntheses of several gamma-substituted butenolides with tertiary and quaternary asymmetric centers were established from a single chiral material. (C) 2003 Elsevier Science Ltd. All rights reserved.