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Resource pressure and environmental change on the North African littoral: Epipalaeolithic to Roman gastropods from Cyrenaica, Libya
Abstract This paper discusses the marine and terrestrial shell on Epipalaeolithic to Classical-period sites in the Cyrenaican coastlands, northeast Libya, with particular reference to the Haua Fteah,… Expand
The Human Use of Caves in Peninsular and Island Southeast Asia: Research Themes
This paper introduces the essays in this volume. The challenging complexities of site formation and cave taphonomy in humid tropical environments are emphasized, as is the need for more sophisticated… Expand
Foraging-farming transitions at the Niah Caves, Sarawak, Borneo
The Niah Caves in Sarawak, Borneo, have captured evidence for people and economies of 8000 and 4000 years ago. Although not continuous on this site, these open two windows on to life at the cultural… Expand
The decline of desert agriculture: a view from the classical period Negev
Differing strategies for water supply and farming in the Syrian Black Desert
Enantioselective, palladium-catalyzed α-arylation of N-Boc pyrrolidine: in situ react IR spectroscopic monitoring, scope, and synthetic applications.
- G. Barker, Julia L McGrath, +4 authors P. O’Brien
- Chemistry, Medicine
- The Journal of organic chemistry
- 8 July 2011
A comprehensive study of the enantioselective Pd-catalyzed α-arylation of N-Boc pyrrolidine has been carried out. The protocol involves deprotonation of N-Boc pyrrolidine using s-BuLi/(-)-sparteine… Expand
Diamine-free lithiation-trapping of N-Boc heterocycles using s-BuLi in THF.
A diamine-free protocol for the s-BuLi-mediated lithiation-trapping of N-Boc heterocycles has been developed. In the optimized procedure, lithiation is accomplished using s-BuLi in THF at -30 °C for… Expand
Asymmetric lithiation trapping of N-Boc heterocycles at temperatures above -78 °C.
- Giacomo Gelardi, G. Barker, P. O’Brien, D. Blakemore
- Chemistry, Medicine
- Organic letters
- 15 October 2013
The asymmetric lithiation trapping of N-Boc heterocycles using s-BuLi/chiral diamines at temperatures up to -20 °C is reported. Depending on the N-Boc heterocycle, lithiation is accomplished using… Expand
The role of maguey in the Mesoamerican tierra fría: ethnographic, historic and archaeological perspectives