Cyclizations of alkynes: revisiting Baldwin's rules for ring closure

K Gilmore, IV Alabugin - Chemical Reviews, 2011 - ACS Publications
According to the CRC dictionary of natural products, 1 90% of chemically individual
molecules discovered in nature contain either a carbocyclic or a heterocyclic subunit. 2 Not …

Carbocycles from carbohydrates via free radical cyclizations: new synthetic approaches to glycomimetics

A Martínez-Grau, J Marco-Contelles - Chemical Society Reviews, 1998 - pubs.rsc.org
Free radical cyclization of enantiomerically pure, acyclic presursors derived from
carbohydrates is an excellent method for the synthesis of complex, densely functionalized …

Synthesis of Enantiomerically Pure, Highly Functionalized, Medium-Sized Carbocycles from Carbohydrates:  Formal Total Synthesis of (+)-Calystegine B2

J Marco-Contelles, E de Opazo - The Journal of Organic …, 2002 - ACS Publications
The free radical cyclization (FR) and the ring-closing metathesis (RCM) reaction have been
analyzed in order to develop new and original synthetic protocols for the synthesis of …

5-Endo-Trig Radical Cyclizations of Bromomethyldimethylsilyl Diisopropylpropargylic Ethers. A Highly Diastereoselective Access to Functionalized Cyclopentanes

S Bogen, M Gulea, L Fensterbank… - The Journal of Organic …, 1999 - ACS Publications
An efficient radical sequence involving a 5-exo-dig, a diastereoselective 1, 5-H transfer, and
a rarely observed in an all-carbon system 5-endo-trig cyclization allows the construction of …

Synthesis of (+)-goniothalesdiol and (+)-7-epi-goniothalesdiol

M Babjak, P Kapitán, T Gracza - Tetrahedron, 2005 - Elsevier
A total synthesis of (+)-goniothalesdiol, a 3, 4-dihydroxy-2, 5-disubstituted tetrahydrofuran
isolated from Goniothalamus borneensis (Annonaceae), and its 7-epimer is reported using …

Tributyltin Hydride-Mediated Free-Radical Cyclization of Allene-Tethered Oxime Ethers and Hydrazones

J Marco-Contelles, G Balme, D Bouyssi… - The Journal of …, 1997 - ACS Publications
In this work, we have shown that the tributyltin hydride-mediated cycloisomerization of allene-
tethered oxime ethers or hydrazones is a convenient method for the preparation of …

A New Synthetic Approach to the Carbocyclic Core of Cyclopentane-Type Glycosidase Inhibitors:  Asymmetric Synthesis of Aminocyclopentitols via Free Radical …

J Marco-Contelles, C Destabel, P Gallego… - The Journal of …, 1996 - ACS Publications
The synthesis of compounds 6-8, derived from 2, 3: 5, 6-bis-O-isopropylidene-d-
mannofuranose (3), and the preparation of products 16 and 17, obtained from 2, 3-O …

Formal synthesis of (+)-varitriol. Application of Pd (II)/Cu (II)-catalysed bicyclisation of unsaturated polyols

M Palík, O Karlubíková, D Lackovičová, A Lásiková… - Tetrahedron, 2010 - Elsevier
A formal and improved synthesis of natural (+)-varitriol from d-glucose and dimethyl l-
tartrate, respectively, are reported. The key steps are the Pd (II)/Cu (II)-catalysed …

Synthesis of chiral, densely functionalized medium-sized rings from carbohydrate precursors via regioselective exo/endo-primary alkyl radical cyclizations

J Marco-Contelles, E de Opazo - Tetrahedron Letters, 2000 - Elsevier
Synthesis of chiral, densely functionalized medium-sized rings from carbohydrate precursors
via regioselective exo/endo-primary alkyl radical cyclizations - ScienceDirect Skip to main …

Stereocontrolled Synthesis of Heteroannular Acetals from Functionalized 1, 5-Enynes via Radical Cascades—Construction of Quaternary and 1, 2-Diquaternary …

O Rhode, HMR Hoffmann - Tetrahedron, 2000 - Elsevier
Sequential, radical-mediated cyclizations of 1, 5-enynes have been evaluated with respect
to structure, stereochemistry and reactivity. In series A 5-exo-trig, 6-endo-dig cascades are …