From ring systems, nomenclature

When the aldehyde group is directly attached to a carbon atom of a ring system, the suffix -carbaldehyde is added to the name of the ring system, e.g., 2-naphthalenecarbaldehyde. When the aldehyde group is separated from the ring by a chain of carbon atoms, the compound is named (1) as a derivative of the acyclic system or (2) by conjunctive nomenclature, for example, (1) (2-naphthyl)propionaldehyde or (2) 2-naphthalenepropionaldehyde. 

Phosphorus heterocyclic compounds, 1, 493-538 five-membered ring systems, 1, 513-523 nomenclature, 1, 496 six-membered ring systems, 1, 497-513 Photoaromatization oxirenes from, 7, 125-126 Photobleaching chromenes in, 3, 880 Photochemical reactions heterocyclic compound synthesis from, 5, 159 reviews, 1, 56 heterocyclic compounds reviews, 1, 71, 72... 

Throughout the chapter Chemical Abstract (CA) nomenclature is used. In the tables demonstrating the ring systems treated in this review (Tables 1-5) the Autonom Nameprogram generated names are also given, if they are different from the CA names. 

In this chapter, as in CHEC(1984) and CHEC-II(1996) <1984CHEC(6)393, 1996CHEC-II(4)229>, the chemistry of compounds with the 1,2,5-oxadiazole ring system is considered. The history and nomenclature of these compounds, as well as basic synthetic methods and chemical properties of 1,2,5-oxadiazoles reported before 1996, were reviewed previously . This chapter covers the period from 1996 to 2006. 

In this series, three earlier reviews on carbazole alkaloids were published by Kapil (1), Husson (2), and Chakraborty (3) in the Volumes 13,26, and 44, respectively. The present chapter introduces a new classification of carbazole alkaloids and summarizes the recent synthetic efforts. The nomenclature of carbazole alkaloids used in this review is that of Chemical Abstracts. As shown in Scheme 1.1, the conventional tricyclic ring system of carbazole 1 is denoted by A, B, and C, and the numbering starts from ring A. The term carbazole generally refers to a 9H-carbazole. 

Stelzner Method. This is a general method of applying replacement nomenclature to ring systems it differs from the Chemical Abstracts procedure in that replacement principles are applied in all cases to the name of the hydrocarbon with the same bond distribution in the rings as the heterocycle to be named. This leads to no difference for monocycles (see examples 1-3), but in the case of fused skeletons the parent hydrocarbon of a fully unsaturated heterocycle is frequently a partially hydrogenated molecule. The parent hydrocarbon name for application of either replacement method can be trivial or a name derived by fusion principles (as above). The examples 21-24 of both... 

As 1,4 3,6-dianhydrohexitols are bicyclic systems, the appropriate ring-index nomenclature may also be used. The numbering of the atoms in such names differs from that used in the sugar-derived names. Furthermore, the stereochemistry for each of the anomeric centers has to be separately defined. The compounds under discussion have a 2,6-dioxabicylo[3.3.0]oc-tane framework, shown in Formula 6, and incorporates hydroxyl groups on C-4 and C-8. 

---