𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Macrocycles, 1. Macrocyclic polymerizations of (thio)lactones – stepwise ring expansion and ring contraction

✍ Scribed by Hans R. Kricheldorf; Soo-Ran Lee; Nicole Schittenhelm

Book ID
102662035
Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
735 KB
Volume
199
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Synthesis of macrocyclic lactams and lac
Synthesis of macrocyclic lactams and lactones via ring-closing olefin metathesis
✍ William P.D. Goldring; AndréS. Hodder; Larry Weiler 📂 Article 📅 1998 🏛 Elsevier Science 🌐 French ⚖ 254 KB

## A&Wrack Lactones and lactams 4-6 were synthesized from a series of acyclic dienes 1-3 via ringclosing olefin metathesis, as shown in equation 1. The geometry of the resulting double bond was determined, and the UZratios compared to values from molecular mechanics calculations.

Macrocycles, 5. Ring expansion of macroc
Macrocycles, 5. Ring expansion of macrocyclic tin alkoxides with cyclic anhydrides
✍ Hans R. Kricheldorf; Sven Eggerstedt 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 86 KB 👁 1 views

At moderate temperatures the dimeric 2,2-dibutyl-2-stanna-1,3-dioxolane (DSDOL) and the monomeric 2,2-dibutyl-2-stanna-1,3-dioxepane (DSDOP) add to equivalents of succinic anhydride by a clean insertion reaction into the Sn1O bonds. The resulting 30-and 17-membered macrocycles are stable up to tempe

A new synthesis of macrocyclic keto-lact
A new synthesis of macrocyclic keto-lactones via ring expansion of 2-(3-hydroxypropyl)-2-nitrocycloalkanones
✍ Richard C. Cookson; Partha S. Ray 📂 Article 📅 1982 🏛 Elsevier Science 🌐 French ⚖ 183 KB

2-(3-Hydroxypropyl)-2-nitrocycloalkanones undergo base-catalysed isomerisation into nitro-lactones containing 'Theketo-lactones 5 have been made before by oxidation of the dihydropyrans 7 to the diols with moist peractic acid followed by treatment with lead tetra-acetate or by direct oxidation with