Reactions of a bridgehead sulfonium salt with nucleophiles. Proton nuclear magnetic resonance spectra of hexahydro-1,1-dimethyl-3H-2,4,7-ethanylylidene-1H-cyclopenta[c]thiopyrilium bromide and its derivatives

Proton magnetic resonance studies of com

Proton magnetic resonance studies of compounds with bridgehead nitrogen atoms: XXXII—The 1H n.m.r. spectra and stereochemistry of 4-aryl-1,6,7,11b-tetrahydro-2H,4H-[1,3]oxazino[4,3-a]isoquinoline, 4-aryl-1,2,6,7,12,12b-hexahydro-4H-[1,3]oxazino[3′,4′:1,2]pyrido[3,4-b]indole and of related systems

✍ Trevor A. Crabb; Jacqueline S. Mitchell 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 284 KB

## Abstract __cis__(4‐H,11b‐H)‐4‐Aryl‐1,6,7,11b‐tetrahydro‐2__H__,4__H__‐[1,3]oxazino [4,3‐__a__]isoquinoline and the related thiazino compound preferentially adopt in solution the O (or S) inside __cis__‐conformation in contrast to __cis__(1‐H,4a‐H)‐1‐arylperhydropyrido[1,2‐__c__][1,3]oxazine whic