Synthesis of densely functionalized pyrrolidinone templates by an intramolecular oxo-Diels–Alder reaction
摘要:
Preparation of densely functionalized pyrrolidinone templates, is a challenge for synthetic chemists. These templates are important building blocks for novel conformationally constrained natural products or for library generation of highly functionalized bi or polycyclic compounds. We discovered that trienes 6a-j undergo facile stereoselective intramolecular Diels-Alder reactions to generate densely functionalized cis fused pyrrolidinone templates 1a-j. These reactions allow for directed remote hydroxylation with complete control of stereochemistry. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of densely functionalized pyrrolidinone templates by an intramolecular oxo-Diels–Alder reaction
摘要:
Preparation of densely functionalized pyrrolidinone templates, is a challenge for synthetic chemists. These templates are important building blocks for novel conformationally constrained natural products or for library generation of highly functionalized bi or polycyclic compounds. We discovered that trienes 6a-j undergo facile stereoselective intramolecular Diels-Alder reactions to generate densely functionalized cis fused pyrrolidinone templates 1a-j. These reactions allow for directed remote hydroxylation with complete control of stereochemistry. (C) 2002 Elsevier Science Ltd. All rights reserved.
Interesting Behavior of α,β-Unsaturated Oximes in Intramolecular [4 + 2] Cycloaddition Reactions
作者:David François、Amy Maden、William V. Murray
DOI:10.1021/ol049640n
日期:2004.6.1
[structure: see text] Intramolecular [4 + 2] cycloaddition using alpha,beta-unsaturated oximes was explored. The reactions proceeded under unusually facile conditions to furnish the nitrones. The latter were subsequently reacted with DMAD to afford [3 + 2] cycloaddition products.
An intramolecular oxo Diels–Alder approach to 1-oxo-1,2,3,3a,4,7a-hexahydro-pyrano[3,4-c]pyrrole-4-carboxylic acid ethyl esters
作者:William V Murray、Pranab K Mishra、Ignatius J Turchi、Dorota Sawicka、Amy Maden、Sengen Sun
DOI:10.1016/j.tet.2003.04.007
日期:2003.11
The diastereoselective synthesis of a series of 1-oxo-1,2,3,3a,4,7a-hexahydro-pyrano[3,4-c]pyrrole-4-carboxylic acid ethyl esters via an oxo Diels-Alder reaction is described. Ab initio calculations predicted the products of the exo cycloaddition to be the thermodynamic products while the products resulting from the endo cycloaddition were predicted to be the kinetic products. The calculations were born out by experimental data. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis of densely functionalized pyrrolidinone templates by an intramolecular oxo-Diels–Alder reaction
作者:William V. Murray、Pranab K. Mishra、Sengen Sun、Amy Maden
DOI:10.1016/s0040-4039(02)01711-2
日期:2002.10
Preparation of densely functionalized pyrrolidinone templates, is a challenge for synthetic chemists. These templates are important building blocks for novel conformationally constrained natural products or for library generation of highly functionalized bi or polycyclic compounds. We discovered that trienes 6a-j undergo facile stereoselective intramolecular Diels-Alder reactions to generate densely functionalized cis fused pyrrolidinone templates 1a-j. These reactions allow for directed remote hydroxylation with complete control of stereochemistry. (C) 2002 Elsevier Science Ltd. All rights reserved.