Core and double bond functionalisation of cyclopentadithiophene-phosphaalkenes

Abstract

The heterofulvenoid cyclopentadithiophene-phosphaalkene is a versatile building block for opto-electronic tuning with donor and acceptor moieties. Both the annulated thienyl rings and the phosphaalkene bond can be functionalised using a...

The Phospha-Bora-Wittig Reaction

“…After the formation of the 1,2,3-phosphaboraoxetanes 2a – e (80 °C, 2 h), AlBr 3 addition affords known and novel phosphaalkenes 3a – e in good purity and yield (Figure a, 53–95%). Fluorenylidene phosphaalkenes (e.g., 3c ) are promising components for organic materials based on their optoelectronic and redox properties. − …”

Overview of the Synthesis and Catalytic Reactivity of Transition Metal Complexes Based on C═P Bond Systems

“…The initial Au complex slowly was decomposed by hydrolysis and formed hydrogen-bonded monometallic species 209 (Scheme 71). 210 Last interesting report described functionalization of fluorenyl phosphaalkenes with heteroaromatic substituents (bithiophene, benzothiophene, and pyridine) leading to varying reactivity and bathochromically shifted maxima and onset of low energy absorption. 80 2.9.…”

The Phospha-Bora-Wittig Reaction

“…3c) are promising components for organic materials based on their optoelectronic and redox properties. [32][33][34][35][36] When diphosphadiboretane 1 was reacted with esters in place of ketones/aldehydes, direct conversion to the 2-alkoxyphosphaalkene products occurred (Figure 3). For example, the reaction of 1 and ethyl acetate led to the new phosphaalkene 4a as a mixture (22:78) of E and Z isomers, identified by signals in the 31 with those for 2a-e (Figure S1).…”